./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0 --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- 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-e04fb08 [2022-11-16 20:06:50,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:06:50,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:06:50,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:06:50,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:06:50,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:06:50,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:06:50,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:06:50,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:06:50,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:06:50,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:06:50,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:06:50,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:06:50,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:06:50,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:06:50,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:06:50,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:06:50,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:06:50,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:06:50,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:06:50,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:06:50,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:06:50,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:06:50,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:06:50,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:06:50,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:06:50,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:06:50,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:06:50,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:06:50,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:06:50,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:06:50,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:06:50,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:06:50,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:06:50,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:06:50,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:06:50,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:06:50,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:06:50,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:06:50,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:06:50,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:06:50,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:06:50,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:06:50,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:06:50,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:06:50,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:06:50,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:06:50,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:06:50,798 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:06:50,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:06:50,799 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:06:50,799 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:06:50,801 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:06:50,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:06:50,802 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:06:50,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:06:50,802 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:06:50,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:06:50,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:06:50,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:06:50,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:06:50,805 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:06:50,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:06:50,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:06:50,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:06:50,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:06:50,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:06:50,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:06:50,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:06:50,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:06:50,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:06:50,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:06:50,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:06:50,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:06:50,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:06:50,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:06:50,811 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:06:50,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:06:50,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:06:50,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:06:50,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:06:50,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:06:50,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:06:50,814 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_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-11-16 20:06:51,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:06:51,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:06:51,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:06:51,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:06:51,261 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:06:51,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/pcompf.c [2022-11-16 20:06:51,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/data/93efbeb18/1fb39b0b830343df87437c232c63fccc/FLAG69ea94300 [2022-11-16 20:06:51,943 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:06:51,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/sv-benchmarks/c/array-fpi/pcompf.c [2022-11-16 20:06:51,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/data/93efbeb18/1fb39b0b830343df87437c232c63fccc/FLAG69ea94300 [2022-11-16 20:06:52,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/data/93efbeb18/1fb39b0b830343df87437c232c63fccc [2022-11-16 20:06:52,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:06:52,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:06:52,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:06:52,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:06:52,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:06:52,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b89ceaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52, skipping insertion in model container [2022-11-16 20:06:52,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:06:52,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:06:52,529 WARN L229 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_38c17e45-2eaf-44eb-99de-c7932c81e58a/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-16 20:06:52,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:06:52,572 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:06:52,586 WARN L229 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_38c17e45-2eaf-44eb-99de-c7932c81e58a/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-16 20:06:52,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:06:52,614 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:06:52,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52 WrapperNode [2022-11-16 20:06:52,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:06:52,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:06:52,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:06:52,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:06:52,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,659 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-11-16 20:06:52,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:06:52,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:06:52,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:06:52,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:06:52,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:06:52,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:06:52,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:06:52,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:06:52,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (1/1) ... [2022-11-16 20:06:52,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:06:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:52,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:06:52,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:06:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:06:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:06:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:06:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:06:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:06:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:06:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:06:52,928 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:06:52,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:06:53,128 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:06:53,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:06:53,182 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 20:06:53,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:06:53 BoogieIcfgContainer [2022-11-16 20:06:53,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:06:53,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:06:53,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:06:53,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:06:53,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:06:52" (1/3) ... [2022-11-16 20:06:53,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b4bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:06:53, skipping insertion in model container [2022-11-16 20:06:53,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:06:52" (2/3) ... [2022-11-16 20:06:53,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b4bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:06:53, skipping insertion in model container [2022-11-16 20:06:53,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:06:53" (3/3) ... [2022-11-16 20:06:53,198 INFO L112 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-11-16 20:06:53,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:06:53,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:06:53,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:06:53,330 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;@4d8fa1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:06:53,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:06:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:06:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:06:53,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:53,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:06:53,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2022-11-16 20:06:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:53,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521046232] [2022-11-16 20:06:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:53,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:06:53,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134184651] [2022-11-16 20:06:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:53,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:53,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:06:53,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:06:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:06:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:06:54,231 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-16 20:06:54,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-16 20:06:54,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:06:54,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:06:54,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:06:55,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:06:55,341 INFO L321 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2022-11-16 20:06:55,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 102 treesize of output 105 [2022-11-16 20:06:55,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:06:55,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:06:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:55,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:06:55,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:55,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521046232] [2022-11-16 20:06:55,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:06:55,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134184651] [2022-11-16 20:06:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134184651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:55,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:55,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:06:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025968859] [2022-11-16 20:06:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:06:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:06:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:06:55,578 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-16 20:06:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:55,775 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-16 20:06:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:06:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 20:06:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:55,785 INFO L225 Difference]: With dead ends: 37 [2022-11-16 20:06:55,785 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 20:06:55,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:06:55,792 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:06:55,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:06:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 20:06:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-16 20:06:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-11-16 20:06:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-11-16 20:06:55,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2022-11-16 20:06:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:55,830 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-11-16 20:06:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-16 20:06:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2022-11-16 20:06:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:06:55,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:55,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:06:55,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:06:56,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:06:56,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2022-11-16 20:06:56,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:56,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469128490] [2022-11-16 20:06:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:56,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:06:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653334031] [2022-11-16 20:06:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:56,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:06:56,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:06:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:56,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:06:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:06:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:56,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:06:56,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:56,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469128490] [2022-11-16 20:06:56,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:06:56,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653334031] [2022-11-16 20:06:56,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653334031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:56,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:56,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:06:56,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52395797] [2022-11-16 20:06:56,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:06:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:06:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:06:56,198 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 20:06:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:56,283 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-16 20:06:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:06:56,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:06:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:56,285 INFO L225 Difference]: With dead ends: 36 [2022-11-16 20:06:56,285 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 20:06:56,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:06:56,287 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:06:56,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:06:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 20:06:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2022-11-16 20:06:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2022-11-16 20:06:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 20:06:56,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-16 20:06:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:56,297 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 20:06:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 20:06:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-16 20:06:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:06:56,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:56,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:06:56,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:06:56,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:56,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2022-11-16 20:06:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:56,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534141532] [2022-11-16 20:06:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:56,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:06:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567702953] [2022-11-16 20:06:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:56,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:56,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:06:56,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:06:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:06:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:06:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:56,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:06:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:56,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534141532] [2022-11-16 20:06:56,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:06:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567702953] [2022-11-16 20:06:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567702953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:06:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437530445] [2022-11-16 20:06:56,761 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:06:56,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:06:56,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:06:56,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:06:56,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:06:57,077 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:06:57,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:06:57,248 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:06:57,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:06:57,555 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:06:57,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:06:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:06:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:06:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:06:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:06:57,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:06:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:57,951 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:06:57,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:06:58,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:06:58,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:06:58,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:06:58,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:06:58,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:06:58,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-16 20:06:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632146433] [2022-11-16 20:06:58,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:06:58,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:06:58,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:06:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:06:58,567 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:06:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:58,687 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-16 20:06:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:06:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:06:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:58,688 INFO L225 Difference]: With dead ends: 33 [2022-11-16 20:06:58,688 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 20:06:58,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:06:58,690 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:06:58,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:06:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 20:06:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-16 20:06:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-11-16 20:06:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-16 20:06:58,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-16 20:06:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:58,697 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-16 20:06:58,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:06:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-16 20:06:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:06:58,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:58,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:06:58,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 20:06:58,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:58,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2022-11-16 20:06:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:58,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139788181] [2022-11-16 20:06:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:58,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:06:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250324759] [2022-11-16 20:06:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:58,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:06:58,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:06:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:06:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:06:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:59,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:06:59,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:06:59,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139788181] [2022-11-16 20:06:59,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:06:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250324759] [2022-11-16 20:06:59,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250324759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:06:59,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:06:59,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:06:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807486040] [2022-11-16 20:06:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:06:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:06:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:06:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:06:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:06:59,112 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:06:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:06:59,201 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-16 20:06:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:06:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 20:06:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:06:59,203 INFO L225 Difference]: With dead ends: 29 [2022-11-16 20:06:59,203 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 20:06:59,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:06:59,205 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:06:59,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:06:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 20:06:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-16 20:06:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-16 20:06:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-16 20:06:59,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2022-11-16 20:06:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:06:59,211 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-16 20:06:59,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:06:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-16 20:06:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:06:59,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:06:59,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:06:59,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:06:59,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:59,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:06:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:06:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2022-11-16 20:06:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:06:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871945991] [2022-11-16 20:06:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:06:59,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:06:59,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679635182] [2022-11-16 20:06:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:06:59,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:06:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:06:59,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:06:59,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:06:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:06:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 20:06:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:06:59,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:06:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:59,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:59,613 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 20:06:59,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 20:06:59,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:06:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:06:59,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:06:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:06:59,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 20:06:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:06:59,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:06:59,909 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-16 20:06:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 20:07:00,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871945991] [2022-11-16 20:07:00,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679635182] [2022-11-16 20:07:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679635182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420334783] [2022-11-16 20:07:00,004 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:07:00,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:00,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:00,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:00,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:00,294 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:07:00,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:07:00,513 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:00,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:00,915 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:00,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:01,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:07:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,274 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:07:01,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:07:01,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,464 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:01,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,581 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-16 20:07:01,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 20:07:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,657 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:01,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,690 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:01,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:01,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,800 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-16 20:07:01,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 20:07:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:01,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:01,887 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:01,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:01,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:02,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:02,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:02,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:02,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-16 20:07:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070223600] [2022-11-16 20:07:02,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 20:07:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 20:07:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=5, NotChecked=32, Total=342 [2022-11-16 20:07:02,557 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-11-16 20:07:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:02,799 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-16 20:07:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:07:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 20:07:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:02,800 INFO L225 Difference]: With dead ends: 26 [2022-11-16 20:07:02,800 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:07:02,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=400, Unknown=6, NotChecked=42, Total=552 [2022-11-16 20:07:02,802 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:02,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-16 20:07:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:07:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-16 20:07:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-11-16 20:07:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 20:07:02,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2022-11-16 20:07:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:02,807 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 20:07:02,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-11-16 20:07:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 20:07:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:07:02,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:02,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:02,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:03,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1328410336, now seen corresponding path program 2 times [2022-11-16 20:07:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:03,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876361704] [2022-11-16 20:07:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:03,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375512675] [2022-11-16 20:07:03,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:07:03,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:03,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:03,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:03,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:07:03,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:07:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:07:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:07:03,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:07:03,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876361704] [2022-11-16 20:07:03,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375512675] [2022-11-16 20:07:03,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375512675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632076166] [2022-11-16 20:07:03,276 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:07:03,276 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:03,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:03,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:03,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:03,377 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:03,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:03,627 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:03,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:03,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-16 20:07:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:03,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-16 20:07:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,079 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-16 20:07:04,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 489 [2022-11-16 20:07:04,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,406 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:04,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,491 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 20:07:04,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-16 20:07:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,568 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:04,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,594 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:04,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,680 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-16 20:07:04,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 20:07:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:04,743 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:04,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:04,800 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:05,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:05,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:05,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:05,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:07:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718917195] [2022-11-16 20:07:05,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:05,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:07:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:07:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:07:05,367 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-11-16 20:07:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:05,516 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-16 20:07:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:07:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:07:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:05,518 INFO L225 Difference]: With dead ends: 48 [2022-11-16 20:07:05,519 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 20:07:05,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:07:05,520 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:05,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 18 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:07:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 20:07:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-16 20:07:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-16 20:07:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-16 20:07:05,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-11-16 20:07:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:05,528 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-16 20:07:05,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-11-16 20:07:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-16 20:07:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:07:05,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:05,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:05,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:07:05,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1261411007, now seen corresponding path program 1 times [2022-11-16 20:07:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:05,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141435828] [2022-11-16 20:07:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:05,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:05,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939817822] [2022-11-16 20:07:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:05,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:05,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:05,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:07:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:07:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 20:07:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:06,631 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-16 20:07:06,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-11-16 20:07:06,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-16 20:07:06,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:06,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:06,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:07,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:12,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2806 treesize of output 2736 [2022-11-16 20:07:13,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:13,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 20:07:14,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 20:07:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 20:07:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:14,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 50 [2022-11-16 20:07:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 20:07:14,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:14,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 97 [2022-11-16 20:07:14,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:14,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:14,749 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:07:14,751 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:07:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:14,816 INFO L321 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2022-11-16 20:07:14,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 592 treesize of output 493 [2022-11-16 20:07:14,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:14,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:14,981 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:07:15,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:15,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 20:07:15,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,352 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:15,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 20:07:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:15,800 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:15,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 418 treesize of output 369 [2022-11-16 20:07:15,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:15,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:16,016 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:16,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 20:07:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:16,052 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 20:07:16,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2022-11-16 20:07:16,234 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:07:16,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 32 [2022-11-16 20:07:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:07:16,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:07:16,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:16,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141435828] [2022-11-16 20:07:16,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:16,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939817822] [2022-11-16 20:07:16,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939817822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:16,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900178308] [2022-11-16 20:07:16,729 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 20:07:16,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:16,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:16,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:16,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:16,919 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:07:16,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:07:17,154 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:17,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-16 20:07:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-16 20:07:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,446 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-16 20:07:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 489 [2022-11-16 20:07:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,602 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,647 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 20:07:17,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-16 20:07:17,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,694 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:17,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:17,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,752 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:17,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:17,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,788 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:17,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:17,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:17,836 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:17,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:18,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:18,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-16 20:07:18,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:18,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:18,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-16 20:07:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257665180] [2022-11-16 20:07:18,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:18,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:07:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:07:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=468, Unknown=8, NotChecked=0, Total=552 [2022-11-16 20:07:18,822 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-11-16 20:07:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:19,265 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-16 20:07:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:07:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 20:07:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:19,267 INFO L225 Difference]: With dead ends: 31 [2022-11-16 20:07:19,267 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 20:07:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=103, Invalid=590, Unknown=9, NotChecked=0, Total=702 [2022-11-16 20:07:19,269 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-16 20:07:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 20:07:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-16 20:07:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-11-16 20:07:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-16 20:07:19,283 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 14 [2022-11-16 20:07:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:19,283 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-16 20:07:19,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-11-16 20:07:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-16 20:07:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:07:19,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:19,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:19,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 20:07:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:07:19,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 970754635, now seen corresponding path program 3 times [2022-11-16 20:07:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355389022] [2022-11-16 20:07:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:19,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:19,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705208096] [2022-11-16 20:07:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:07:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:19,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:19,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:07:19,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:07:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 20:07:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:19,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:07:19,840 INFO L321 Elim1Store]: treesize reduction 78, result has 41.4 percent of original size [2022-11-16 20:07:19,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 272 [2022-11-16 20:07:19,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:07:19,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:07:19,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:07:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,290 INFO L321 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2022-11-16 20:07:20,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 154 [2022-11-16 20:07:20,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:20,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:20,425 WARN L855 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (let ((.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (.cse1 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (or (and .cse0 .cse1 (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (v_DerPreprocessor_55 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int)) (v_DerPreprocessor_45 (Array Int Int)) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse3 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55))) (let ((.cse2 (store (store (store (store (store (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46))) (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= v_DerPreprocessor_45 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) (= (select v_DerPreprocessor_46 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) (= (select v_DerPreprocessor_55 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) v_DerPreprocessor_54))))))) (and (or (and .cse0 (exists ((v_DerPreprocessor_48 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (let ((.cse5 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49))) (and (= (select v_DerPreprocessor_49 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_47))))) (and .cse0 (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)))) (not .cse1)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from true [2022-11-16 20:07:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,497 INFO L321 Elim1Store]: treesize reduction 26, result has 40.9 percent of original size [2022-11-16 20:07:20,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 193 [2022-11-16 20:07:20,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:20,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:20,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:20,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:07:20,599 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:07:20,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 33 [2022-11-16 20:07:20,698 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:07:20,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 42 [2022-11-16 20:07:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-16 20:07:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-16 20:07:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:20,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 20:07:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:21,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 20:07:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 20:07:21,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:07:27,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355389022] [2022-11-16 20:07:27,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705208096] [2022-11-16 20:07:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705208096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422352209] [2022-11-16 20:07:27,132 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:07:27,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:27,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:27,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:27,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:27,248 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:27,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:27,524 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:27,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:27,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-16 20:07:27,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:07:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,806 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:07:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:07:27,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:27,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:27,950 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:27,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,021 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 20:07:28,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-16 20:07:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,066 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:28,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,120 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,170 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:28,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:28,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:28,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:28,207 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:28,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:28,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:28,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:28,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:28,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:28,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-16 20:07:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732468829] [2022-11-16 20:07:28,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:07:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:07:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=4, NotChecked=48, Total=702 [2022-11-16 20:07:28,891 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-11-16 20:07:28,922 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) (and .cse0 (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_487 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (v_ArrVal_485 Int) (v_ArrVal_491 Int) (v_ArrVal_490 Int)) (or (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (* |ULTIMATE.start_main_~i~0#1| 8))) (store (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_485) (+ .cse3 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_487))))) (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_490) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_148|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_491))) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_148|)) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_148|))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (let ((.cse4 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (or (and .cse0 .cse4 (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (v_DerPreprocessor_55 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int)) (v_DerPreprocessor_45 (Array Int Int)) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse6 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55))) (let ((.cse5 (store (store (store (store (store (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46))) (let ((.cse7 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= v_DerPreprocessor_45 (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) (= (select v_DerPreprocessor_46 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse2 .cse7) (= (select v_DerPreprocessor_55 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse6 |c_ULTIMATE.start_main_~b~0#1.base|) v_DerPreprocessor_54))))))) (and (or (and .cse0 (exists ((v_DerPreprocessor_48 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (let ((.cse8 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49))) (and (= (select v_DerPreprocessor_49 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (select .cse8 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_47))))) (and .cse0 (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)))) (not .cse4)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from true [2022-11-16 20:07:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:29,330 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-11-16 20:07:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 20:07:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 20:07:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:29,332 INFO L225 Difference]: With dead ends: 63 [2022-11-16 20:07:29,332 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 20:07:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=154, Invalid=905, Unknown=5, NotChecked=126, Total=1190 [2022-11-16 20:07:29,333 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:29,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-11-16 20:07:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 20:07:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2022-11-16 20:07:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2022-11-16 20:07:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-16 20:07:29,348 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 14 [2022-11-16 20:07:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:29,349 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-16 20:07:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-11-16 20:07:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-16 20:07:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:07:29,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:29,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:29,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:29,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:29,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1815978007, now seen corresponding path program 2 times [2022-11-16 20:07:29,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:29,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617510632] [2022-11-16 20:07:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:29,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:29,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491835283] [2022-11-16 20:07:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:07:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:29,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:29,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:07:29,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:07:29,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:07:29,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:07:29,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:07:29,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617510632] [2022-11-16 20:07:29,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491835283] [2022-11-16 20:07:29,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491835283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623547509] [2022-11-16 20:07:29,875 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 20:07:29,875 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:29,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:29,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:29,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:30,141 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:07:30,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:07:30,259 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:30,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:30,585 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:30,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:30,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:07:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:30,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,810 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:07:30,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:07:30,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:30,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,956 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:30,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,035 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 20:07:31,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-16 20:07:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,092 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:31,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,112 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:31,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:07:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,200 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-16 20:07:31,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 20:07:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:31,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:31,257 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:31,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:31,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:31,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1408#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:31,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:31,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:31,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:07:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774059126] [2022-11-16 20:07:31,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:07:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:07:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:07:31,845 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:07:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:32,049 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-11-16 20:07:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:07:32,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:07:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:32,050 INFO L225 Difference]: With dead ends: 62 [2022-11-16 20:07:32,050 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 20:07:32,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:07:32,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:32,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:07:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 20:07:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-11-16 20:07:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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) [2022-11-16 20:07:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-16 20:07:32,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 15 [2022-11-16 20:07:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:32,065 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-16 20:07:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:07:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-16 20:07:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:07:32,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:32,066 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:32,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:32,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2106634379, now seen corresponding path program 4 times [2022-11-16 20:07:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:32,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158917894] [2022-11-16 20:07:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:32,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:32,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845551616] [2022-11-16 20:07:32,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:07:32,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:32,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:32,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:07:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:07:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:07:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:07:32,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:07:32,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158917894] [2022-11-16 20:07:32,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845551616] [2022-11-16 20:07:32,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845551616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606099816] [2022-11-16 20:07:32,565 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:07:32,565 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:32,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:32,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:32,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:32,793 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:07:32,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:07:32,925 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:33,235 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:33,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:33,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:07:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,503 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:07:33,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:07:33,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,638 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:33,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:33,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,680 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 20:07:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-16 20:07:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,732 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:33,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,778 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:33,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,815 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:33,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:33,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:33,844 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:33,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:33,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:34,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1678#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:34,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:34,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:34,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:07:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505396038] [2022-11-16 20:07:34,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:07:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:07:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:07:34,244 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:07:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:34,583 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-11-16 20:07:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:07:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:07:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:34,586 INFO L225 Difference]: With dead ends: 71 [2022-11-16 20:07:34,586 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 20:07:34,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:07:34,588 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:34,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:07:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 20:07:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2022-11-16 20:07:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2022-11-16 20:07:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-16 20:07:34,603 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 15 [2022-11-16 20:07:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:34,603 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-16 20:07:34,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:07:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-16 20:07:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:07:34,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:34,605 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:34,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:07:34,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 592635563, now seen corresponding path program 5 times [2022-11-16 20:07:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442226137] [2022-11-16 20:07:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:34,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:34,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608783227] [2022-11-16 20:07:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:07:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:34,842 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:34,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:07:35,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:07:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:07:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:07:35,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:07:35,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:07:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442226137] [2022-11-16 20:07:35,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:07:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608783227] [2022-11-16 20:07:35,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608783227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:07:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281893637] [2022-11-16 20:07:35,189 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:07:35,189 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:07:35,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:07:35,190 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:07:35,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:07:35,291 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:07:35,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:07:35,523 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:07:35,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:07:35,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-16 20:07:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-16 20:07:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,807 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-16 20:07:35,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 484 treesize of output 487 [2022-11-16 20:07:35,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:07:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,953 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:35,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:35,999 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 20:07:36,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-16 20:07:36,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:36,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:36,065 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:36,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:36,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:36,127 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:36,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:36,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:36,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:36,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:36,209 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:36,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:07:36,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:07:36,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1967#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:07:36,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:07:36,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:07:36,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:07:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783221211] [2022-11-16 20:07:36,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:07:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:07:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:07:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:07:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:07:36,689 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2022-11-16 20:07:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:07:37,002 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-11-16 20:07:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:07:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 20:07:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:07:37,004 INFO L225 Difference]: With dead ends: 73 [2022-11-16 20:07:37,004 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 20:07:37,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-11-16 20:07:37,006 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:07:37,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:07:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 20:07:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-11-16 20:07:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2022-11-16 20:07:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-16 20:07:37,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2022-11-16 20:07:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:07:37,017 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-16 20:07:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2022-11-16 20:07:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-16 20:07:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:07:37,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:07:37,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:07:37,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 20:07:37,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:07:37,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:07:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:07:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1741655437, now seen corresponding path program 3 times [2022-11-16 20:07:37,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:07:37,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383153315] [2022-11-16 20:07:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:07:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:07:37,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:07:37,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026940546] [2022-11-16 20:07:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:07:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:07:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:07:37,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:07:37,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:07:37,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:07:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 20:07:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:38,189 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-16 20:07:38,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 462 treesize of output 894 [2022-11-16 20:07:38,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:38,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:38,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-16 20:07:38,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:07:38,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:40,519 INFO L321 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2022-11-16 20:07:40,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 15 case distinctions, treesize of input 833 treesize of output 873 [2022-11-16 20:07:49,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6096 treesize of output 5714 [2022-11-16 20:07:52,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:52,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:52,568 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-16 20:07:52,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 3494 treesize of output 3359 [2022-11-16 20:07:53,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:53,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 122 [2022-11-16 20:07:53,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:53,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:53,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 168 [2022-11-16 20:07:53,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 148 [2022-11-16 20:07:53,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 146 [2022-11-16 20:07:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:53,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 49 [2022-11-16 20:07:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:53,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:53,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:53,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 46 [2022-11-16 20:07:53,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:53,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:54,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:54,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 29 [2022-11-16 20:07:54,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:54,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:54,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:54,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 20:07:54,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 20:07:54,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:54,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 20:07:55,311 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:55,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 20:07:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,373 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:56,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1232 treesize of output 1085 [2022-11-16 20:07:56,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:56,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 62 [2022-11-16 20:07:56,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 20:07:56,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:07:56,626 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:07:56,638 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:07:56,706 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:56,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 20:07:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,795 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:56,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 20:07:56,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,846 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:07:56,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-16 20:07:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:56,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:07:56,883 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-16 20:07:56,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2022-11-16 20:07:56,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:07:56,942 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 20:07:56,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 51 [2022-11-16 20:07:57,195 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:07:57,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 32 [2022-11-16 20:07:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:07:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:08:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:08:00,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:08:00,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383153315] [2022-11-16 20:08:00,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:08:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026940546] [2022-11-16 20:08:00,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026940546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:08:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891811483] [2022-11-16 20:08:00,335 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 20:08:00,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:08:00,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:08:00,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:08:00,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:08:00,551 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-16 20:08:00,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-16 20:08:00,683 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 20:08:00,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-16 20:08:00,999 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:08:01,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:08:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-16 20:08:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,271 INFO L321 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2022-11-16 20:08:01,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 490 treesize of output 484 [2022-11-16 20:08:01,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:08:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,497 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:01,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:01,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,533 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 20:08:01,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-16 20:08:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,572 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:01,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:01,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,620 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:01,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,659 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:01,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:01,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:01,686 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:01,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:01,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:08:02,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2275#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-16 20:08:02,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:08:02,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:08:02,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-16 20:08:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447910476] [2022-11-16 20:08:02,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:08:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 20:08:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:08:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 20:08:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=796, Unknown=16, NotChecked=0, Total=930 [2022-11-16 20:08:02,863 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-11-16 20:08:03,024 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_256| Int) (v_ArrVal_796 Int) (v_ArrVal_794 Int)) (or (= (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse1 v_ArrVal_794) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_256|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_796))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_256|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_256| Int) (v_ArrVal_796 Int) (v_ArrVal_794 Int) (v_ArrVal_793 (Array Int Int))) (or (= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_793))) (let ((.cse3 (store (store (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|) .cse1 v_ArrVal_794) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_256|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_796))) (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|)))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_256|)))))) is different from false [2022-11-16 20:08:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:08:03,282 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-16 20:08:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 20:08:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:08:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:08:03,283 INFO L225 Difference]: With dead ends: 32 [2022-11-16 20:08:03,283 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 20:08:03,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=163, Invalid=1011, Unknown=20, NotChecked=66, Total=1260 [2022-11-16 20:08:03,284 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:08:03,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-16 20:08:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 20:08:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-16 20:08:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-11-16 20:08:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-16 20:08:03,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-11-16 20:08:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:08:03,299 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-16 20:08:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-11-16 20:08:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-16 20:08:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:08:03,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:08:03,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:08:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:08:03,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:08:03,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:08:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:08:03,507 INFO L85 PathProgramCache]: Analyzing trace with hash 553715545, now seen corresponding path program 6 times [2022-11-16 20:08:03,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:08:03,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611897644] [2022-11-16 20:08:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:08:03,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:08:03,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:08:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509336754] [2022-11-16 20:08:03,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:08:03,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:08:03,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:08:03,530 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:08:03,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:08:03,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:08:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:08:03,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 20:08:03,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:08:03,851 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-16 20:08:03,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-16 20:08:03,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:08:03,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:08:03,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:08:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:03,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2022-11-16 20:08:03,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:08:04,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:04,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:04,065 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-16 20:08:04,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 95 [2022-11-16 20:08:04,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:08:04,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:04,241 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-16 20:08:04,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2022-11-16 20:08:04,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:08:04,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:08:04,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:04,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:04,436 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 20:08:04,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 87 [2022-11-16 20:08:04,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:08:04,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:08:04,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:08:04,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:08:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:08:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:08:04,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:08:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:04,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 20:08:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:04,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 20:08:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:04,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 20:08:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:08:04,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:08:06,919 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_282| Int) (|v_ULTIMATE.start_main_~i~0#1_281| Int) (v_ArrVal_903 Int) (v_ArrVal_901 Int) (v_ArrVal_900 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_282|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_282| 1) |v_ULTIMATE.start_main_~i~0#1_281|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_900) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_282|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_901) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_281|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_903) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) is different from false [2022-11-16 20:08:06,986 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_898 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-16 20:08:07,003 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-16 20:08:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-11-16 20:08:07,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:08:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611897644] [2022-11-16 20:08:07,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:08:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509336754] [2022-11-16 20:08:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509336754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:08:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312919810] [2022-11-16 20:08:07,022 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:08:07,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:08:07,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:08:07,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:08:07,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:08:07,245 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-16 20:08:07,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-16 20:08:07,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-16 20:08:07,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-16 20:08:07,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-16 20:08:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,491 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-16 20:08:07,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-16 20:08:07,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 20:08:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,603 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:07,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:08:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,677 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 20:08:07,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-16 20:08:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,736 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:07,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,760 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 20:08:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,842 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 20:08:07,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-16 20:08:07,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:08:07,899 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:08:07,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 20:08:07,946 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:08:08,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2510#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 20:08:08,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:08:08,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:08:08,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-16 20:08:08,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646514907] [2022-11-16 20:08:08,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:08:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 20:08:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:08:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 20:08:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=350, Unknown=4, NotChecked=120, Total=552 [2022-11-16 20:08:08,546 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:08:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:08:13,087 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-16 20:08:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:08:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:08:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:08:13,088 INFO L225 Difference]: With dead ends: 40 [2022-11-16 20:08:13,088 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 20:08:13,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=173, Invalid=762, Unknown=7, NotChecked=180, Total=1122 [2022-11-16 20:08:13,090 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:08:13,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-16 20:08:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 20:08:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-11-16 20:08:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-11-16 20:08:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-16 20:08:13,101 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-11-16 20:08:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:08:13,101 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-16 20:08:13,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:08:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-16 20:08:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 20:08:13,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:08:13,102 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:08:13,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:08:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 20:08:13,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:08:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:08:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1837651189, now seen corresponding path program 4 times [2022-11-16 20:08:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:08:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178803361] [2022-11-16 20:08:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:08:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:08:13,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:08:13,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981830464] [2022-11-16 20:08:13,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:08:13,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:08:13,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:08:13,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:08:13,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:08:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:08:13,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 20:08:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:08:13,561 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 20:08:13,561 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 20:08:13,562 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 20:08:13,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-16 20:08:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 20:08:13,775 INFO L444 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1] [2022-11-16 20:08:13,778 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 20:08:13,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:08:13 BoogieIcfgContainer [2022-11-16 20:08:13,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 20:08:13,812 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 20:08:13,812 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 20:08:13,812 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 20:08:13,813 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:06:53" (3/4) ... [2022-11-16 20:08:13,815 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 20:08:13,863 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38c17e45-2eaf-44eb-99de-c7932c81e58a/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 20:08:13,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 20:08:13,864 INFO L158 Benchmark]: Toolchain (without parser) took 81607.05ms. Allocated memory was 92.3MB in the beginning and 383.8MB in the end (delta: 291.5MB). Free memory was 69.8MB in the beginning and 295.2MB in the end (delta: -225.4MB). Peak memory consumption was 67.2MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,864 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:08:13,865 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.53ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 67.1MB in the end (delta: 2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,865 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.11ms. Allocated memory is still 92.3MB. Free memory was 67.1MB in the beginning and 65.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:08:13,865 INFO L158 Benchmark]: Boogie Preprocessor took 49.65ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 64.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,865 INFO L158 Benchmark]: RCFGBuilder took 475.42ms. Allocated memory is still 92.3MB. Free memory was 64.0MB in the beginning and 48.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,866 INFO L158 Benchmark]: TraceAbstraction took 80622.53ms. Allocated memory was 92.3MB in the beginning and 383.8MB in the end (delta: 291.5MB). Free memory was 48.2MB in the beginning and 298.3MB in the end (delta: -250.1MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,866 INFO L158 Benchmark]: Witness Printer took 51.78ms. Allocated memory is still 383.8MB. Free memory was 298.3MB in the beginning and 295.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 20:08:13,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.53ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 67.1MB in the end (delta: 2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.11ms. Allocated memory is still 92.3MB. Free memory was 67.1MB in the beginning and 65.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.65ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 64.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.42ms. Allocated memory is still 92.3MB. Free memory was 64.0MB in the beginning and 48.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 80622.53ms. Allocated memory was 92.3MB in the beginning and 383.8MB in the end (delta: 291.5MB). Free memory was 48.2MB in the beginning and 298.3MB in the end (delta: -250.1MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. * Witness Printer took 51.78ms. Allocated memory is still 383.8MB. Free memory was 298.3MB in the beginning and 295.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-1:0}, b={-2:0}, c={-3:0}, i=1, N=3] [L36] COND TRUE i