./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/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_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/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_b59cf1ef-56a4-4140-985e-55d2b89ee529/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 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 --- 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 20:10:31,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:10:31,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:10:31,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:10:31,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:10:31,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:10:31,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:10:31,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:10:31,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:10:31,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:10:31,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:10:31,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:10:31,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:10:31,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:10:31,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:10:31,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:10:31,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:10:31,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:10:31,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:10:31,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:10:31,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:10:31,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:10:31,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:10:31,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:10:31,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:10:31,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:10:31,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:10:31,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:10:31,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:10:31,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:10:31,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:10:31,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:10:31,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:10:31,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:10:31,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:10:31,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:10:31,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:10:31,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:10:31,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:10:31,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:10:31,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:10:31,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:10:31,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:10:31,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:10:31,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:10:31,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:10:31,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:10:31,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:10:31,879 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:10:31,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:10:31,880 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:10:31,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:10:31,880 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:10:31,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:10:31,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:10:31,881 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:10:31,881 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:10:31,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:10:31,882 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:10:31,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:10:31,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:10:31,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:10:31,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:10:31,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:10:31,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:10:31,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:10:31,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:10:31,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:10:31,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:10:31,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:10:31,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:10:31,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:10:31,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:10:31,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:10:31,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:31,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:10:31,895 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:10:31,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:10:31,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:10:31,896 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:10:31,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:10:31,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:10:31,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:10:31,897 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_b59cf1ef-56a4-4140-985e-55d2b89ee529/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2022-11-16 20:10:32,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:10:32,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:10:32,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:10:32,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:10:32,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:10:32,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/ss1.c [2022-11-16 20:10:32,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/data/43388afe4/d25376fcc7fc43ddbe3d37430668ab6e/FLAG764bdc45b [2022-11-16 20:10:32,780 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:10:32,781 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/sv-benchmarks/c/array-fpi/ss1.c [2022-11-16 20:10:32,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/data/43388afe4/d25376fcc7fc43ddbe3d37430668ab6e/FLAG764bdc45b [2022-11-16 20:10:33,171 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/data/43388afe4/d25376fcc7fc43ddbe3d37430668ab6e [2022-11-16 20:10:33,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:10:33,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:10:33,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:33,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:10:33,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:10:33,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c9eb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33, skipping insertion in model container [2022-11-16 20:10:33,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:10:33,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:10:33,414 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_b59cf1ef-56a4-4140-985e-55d2b89ee529/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-16 20:10:33,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:33,444 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:10:33,458 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_b59cf1ef-56a4-4140-985e-55d2b89ee529/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-16 20:10:33,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:33,481 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:10:33,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33 WrapperNode [2022-11-16 20:10:33,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:33,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:33,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:10:33,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:10:33,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,521 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-11-16 20:10:33,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:33,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:10:33,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:10:33,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:10:33,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:10:33,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:10:33,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:10:33,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:10:33,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (1/1) ... [2022-11-16 20:10:33,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:33,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:33,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:10:33,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:10:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:10:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:10:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:10:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:10:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:10:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:10:33,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:10:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:10:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:10:33,726 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:10:33,727 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:10:33,900 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:10:33,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:10:33,951 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 20:10:33,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:33 BoogieIcfgContainer [2022-11-16 20:10:33,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:10:33,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:10:33,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:10:33,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:10:33,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:10:33" (1/3) ... [2022-11-16 20:10:33,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0d9f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:33, skipping insertion in model container [2022-11-16 20:10:33,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:33" (2/3) ... [2022-11-16 20:10:33,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0d9f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:33, skipping insertion in model container [2022-11-16 20:10:33,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:33" (3/3) ... [2022-11-16 20:10:33,978 INFO L112 eAbstractionObserver]: Analyzing ICFG ss1.c [2022-11-16 20:10:34,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:10:34,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:10:34,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:10:34,131 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;@719b4e5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:10:34,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:10:34,136 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 20:10:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:10:34,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:34,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:34,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash 581057961, now seen corresponding path program 1 times [2022-11-16 20:10:34,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342615459] [2022-11-16 20:10:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:34,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342615459] [2022-11-16 20:10:34,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 20:10:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233661952] [2022-11-16 20:10:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:34,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:34,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:34,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:10:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:34,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:10:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:34,686 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 20:10:34,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:34,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233661952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:34,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:34,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:10:34,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528317707] [2022-11-16 20:10:34,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:34,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:34,750 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 20:10:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:34,819 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-16 20:10:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 20:10:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:34,831 INFO L225 Difference]: With dead ends: 22 [2022-11-16 20:10:34,831 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 20:10:34,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:34,837 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:34,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:10:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 20:10:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-16 20:10:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 20:10:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-16 20:10:34,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-16 20:10:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:34,873 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-16 20:10:34,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 20:10:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-16 20:10:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:10:34,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:34,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:34,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:35,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:10:35,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 431603023, now seen corresponding path program 1 times [2022-11-16 20:10:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910318904] [2022-11-16 20:10:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:35,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:10:35,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727137357] [2022-11-16 20:10:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:35,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:35,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:35,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:10:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:10:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:10:35,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:35,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910318904] [2022-11-16 20:10:35,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:10:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727137357] [2022-11-16 20:10:35,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727137357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:35,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:35,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:10:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668190521] [2022-11-16 20:10:35,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:10:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:10:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:35,307 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 20:10:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:35,362 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-16 20:10:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:10:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 20:10:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:35,364 INFO L225 Difference]: With dead ends: 18 [2022-11-16 20:10:35,365 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 20:10:35,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:35,368 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:35,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:10:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 20:10:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 20:10:35,381 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 20:10:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-16 20:10:35,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-16 20:10:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:35,383 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-16 20:10:35,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 20:10:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-16 20:10:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:10:35,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:35,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:35,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:35,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 792964949, now seen corresponding path program 1 times [2022-11-16 20:10:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109784768] [2022-11-16 20:10:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:35,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:10:35,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735314121] [2022-11-16 20:10:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:35,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:35,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:10:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:35,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 20:10:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:35,822 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 20:10:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:10:35,886 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 19 treesize of output 18 [2022-11-16 20:10:36,007 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 36 treesize of output 23 [2022-11-16 20:10:36,102 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 36 treesize of output 23 [2022-11-16 20:10:36,202 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 42 treesize of output 25 [2022-11-16 20:10:36,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 51 treesize of output 35 [2022-11-16 20:10:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:10:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:36,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109784768] [2022-11-16 20:10:36,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:10:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735314121] [2022-11-16 20:10:36,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735314121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:10:36,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475310680] [2022-11-16 20:10:36,967 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:10:36,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:10:36,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:10:36,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:10:36,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:10:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,078 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:10:37,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:10:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,209 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:10:37,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:10:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:10:37,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:10:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:37,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:37,646 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:10:37,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:10:37,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:10:37,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:37,888 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:37,889 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:10:38,001 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:38,002 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:38,095 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:38,096 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:10:38,189 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:10:38,189 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:10:38,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:38,269 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:10:38,269 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:10:38,353 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:38,354 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:38,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:10:39,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:10:39,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:10:39,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:10:39,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-16 20:10:39,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154629166] [2022-11-16 20:10:39,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:10:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:10:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:10:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-16 20:10:39,006 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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 20:10:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:39,565 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-16 20:10:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:10:39,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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) Word has length 12 [2022-11-16 20:10:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:39,568 INFO L225 Difference]: With dead ends: 27 [2022-11-16 20:10:39,568 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:10:39,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-16 20:10:39,570 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:39,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-11-16 20:10:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:10:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-16 20:10:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 20:10:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-16 20:10:39,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-16 20:10:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:39,579 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-16 20:10:39,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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 20:10:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-16 20:10:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:10:39,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:39,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:39,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:39,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -911807493, now seen corresponding path program 2 times [2022-11-16 20:10:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767399208] [2022-11-16 20:10:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:39,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:10:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178013842] [2022-11-16 20:10:39,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:10:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:39,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:39,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:10:39,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:10:39,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:10:39,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:10:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:10:39,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:10:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:10:40,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:40,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767399208] [2022-11-16 20:10:40,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:10:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178013842] [2022-11-16 20:10:40,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178013842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:10:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640726575] [2022-11-16 20:10:40,038 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:10:40,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:10:40,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:10:40,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:10:40,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:10:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,154 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:10:40,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:10:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,277 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:10:40,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:10:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-16 20:10:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:10:40,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:40,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:40,562 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:10:40,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:10:40,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:10:40,739 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:40,739 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:10:40,821 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:40,822 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:40,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:40,889 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:40,890 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:10:40,966 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:10:40,967 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:10:41,013 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:41,014 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:10:41,085 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:41,085 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:41,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:10:41,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '416#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:10:41,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:10:41,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:10:41,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:10:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630719456] [2022-11-16 20:10:41,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:10:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:10:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:10:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:10:41,579 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 20:10:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:41,760 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-16 20:10:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:10:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2022-11-16 20:10:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:41,762 INFO L225 Difference]: With dead ends: 31 [2022-11-16 20:10:41,762 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:10:41,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:10:41,763 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:41,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:10:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-16 20:10:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 20:10:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-16 20:10:41,772 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-16 20:10:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:41,773 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-16 20:10:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 20:10:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-16 20:10:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:10:41,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:41,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:41,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:41,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:41,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1188195942, now seen corresponding path program 3 times [2022-11-16 20:10:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:41,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47930889] [2022-11-16 20:10:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:41,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:42,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:10:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382114446] [2022-11-16 20:10:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:10:42,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:42,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:42,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:10:42,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:10:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:10:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:10:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:10:42,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:10:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:10:42,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47930889] [2022-11-16 20:10:42,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:10:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382114446] [2022-11-16 20:10:42,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382114446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:10:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679845630] [2022-11-16 20:10:42,162 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:10:42,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:10:42,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:10:42,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:10:42,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:10:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,281 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:10:42,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:10:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:10:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-16 20:10:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:10:42,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:42,593 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:10:42,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:10:42,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:10:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:42,759 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:42,760 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:10:42,835 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:42,835 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:42,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:42,902 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:10:42,902 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:10:42,968 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:10:42,969 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:10:43,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:43,049 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:10:43,050 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:10:43,137 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:10:43,137 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:10:43,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:10:43,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '600#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:10:43,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:10:43,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:10:43,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:10:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471828140] [2022-11-16 20:10:43,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:10:43,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:10:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:10:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:10:43,568 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 20:10:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:43,679 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-16 20:10:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:10:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2022-11-16 20:10:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:43,680 INFO L225 Difference]: With dead ends: 33 [2022-11-16 20:10:43,680 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 20:10:43,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:10:43,684 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:43,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 20:10:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 20:10:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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 20:10:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 20:10:43,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-16 20:10:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:43,695 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 20:10:43,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 20:10:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 20:10:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:10:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:43,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:43,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:43,909 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1993429225, now seen corresponding path program 4 times [2022-11-16 20:10:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086167263] [2022-11-16 20:10:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:43,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:10:43,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567682377] [2022-11-16 20:10:43,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:10:43,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:43,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:43,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:10:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 20:10:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:44,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-16 20:10:44,083 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 20:10:44,103 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 24 treesize of output 23 [2022-11-16 20:10:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,145 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 28 treesize of output 30 [2022-11-16 20:10:44,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,245 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 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-16 20:10:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,313 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 0 case distinctions, treesize of input 47 treesize of output 35 [2022-11-16 20:10:44,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2022-11-16 20:10:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,483 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 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-16 20:10:44,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:10:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:10:44,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-11-16 20:10:44,675 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 0 case distinctions, treesize of input 43 treesize of output 33 [2022-11-16 20:10:44,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2022-11-16 20:10:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:44,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:00,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086167263] [2022-11-16 20:11:00,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:11:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567682377] [2022-11-16 20:11:00,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567682377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729586690] [2022-11-16 20:11:00,097 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:11:00,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:00,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:11:00,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:11:00,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:11:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,208 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:11:00,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:11:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,245 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:11:00,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:11:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,368 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:11:00,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:11:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:11:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:00,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:00,677 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:11:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:11:00,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:11:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:00,897 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:11:00,897 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:11:00,974 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:00,975 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:01,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:01,042 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:11:01,043 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:11:01,113 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:11:01,114 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:11:01,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:01,163 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:11:01,163 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:11:01,256 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:01,257 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:01,306 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:11:02,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '813#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:11:02,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:11:02,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:11:02,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-16 20:11:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269313796] [2022-11-16 20:11:02,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:02,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 20:11:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 20:11:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=898, Unknown=3, NotChecked=0, Total=992 [2022-11-16 20:11:02,875 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:08,315 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-16 20:11:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 20:11:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 20:11:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:08,316 INFO L225 Difference]: With dead ends: 36 [2022-11-16 20:11:08,316 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 20:11:08,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=116, Invalid=1141, Unknown=3, NotChecked=0, Total=1260 [2022-11-16 20:11:08,318 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:08,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 236 Invalid, 0 Unknown, 36 Unchecked, 1.5s Time] [2022-11-16 20:11:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 20:11:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-16 20:11:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 20:11:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-16 20:11:08,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-11-16 20:11:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:08,336 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-16 20:11:08,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-16 20:11:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:11:08,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:08,338 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:08,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 20:11:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:11:08,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2119813775, now seen corresponding path program 5 times [2022-11-16 20:11:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90422660] [2022-11-16 20:11:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:08,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:11:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92281808] [2022-11-16 20:11:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:11:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:08,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:08,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:11:08,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:11:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:11:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:11:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:11:08,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:11:08,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:08,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90422660] [2022-11-16 20:11:08,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:11:08,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92281808] [2022-11-16 20:11:08,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92281808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195355961] [2022-11-16 20:11:08,881 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:11:08,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:08,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:11:08,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:11:08,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:11:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:08,999 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:11:09,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:11:09,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,048 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:11:09,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:11:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,187 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:11:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:11:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:11:09,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:09,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:09,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:09,453 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:11:09,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:11:09,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:11:09,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:09,684 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:11:09,685 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:11:09,771 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:09,772 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:09,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:09,855 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:11:09,855 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:11:09,946 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:11:09,946 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:11:10,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:10,038 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:11:10,039 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:11:10,132 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:10,132 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:10,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:11:10,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:11:10,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:11:10,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:11:10,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:11:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225136021] [2022-11-16 20:11:10,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:11:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:11:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:11:10,798 INFO L87 Difference]: Start difference. First operand 25 states and 31 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 20:11:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:11,024 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-16 20:11:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:11:11,025 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 17 [2022-11-16 20:11:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:11,026 INFO L225 Difference]: With dead ends: 41 [2022-11-16 20:11:11,026 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 20:11:11,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:11:11,028 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:11,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 20:11:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-16 20:11:11,041 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 20:11:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-16 20:11:11,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-11-16 20:11:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:11,042 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-16 20:11:11,043 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 20:11:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-16 20:11:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:11:11,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:11,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:11,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 20:11:11,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:11:11,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1666458246, now seen corresponding path program 6 times [2022-11-16 20:11:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505587807] [2022-11-16 20:11:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:11,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:11,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:11:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047060206] [2022-11-16 20:11:11,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:11:11,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:11,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:11:11,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:11:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:11:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:11:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:11:11,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:11:11,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505587807] [2022-11-16 20:11:11,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:11:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047060206] [2022-11-16 20:11:11,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047060206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560418559] [2022-11-16 20:11:11,526 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:11:11,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:11,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:11:11,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:11:11,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:11:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,584 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:11:11,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:11:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,703 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:11:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:11:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,836 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:11:11,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:11:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:11:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:12,091 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:11:12,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:11:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:11:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:12,260 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:11:12,260 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:11:12,361 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:12,361 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:12,435 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:11:12,435 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:11:12,532 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:11:12,533 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:11:12,584 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:11:12,584 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:11:12,671 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:11:12,671 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:11:12,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:11:13,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1286#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:11:13,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:11:13,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:11:13,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:11:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545546953] [2022-11-16 20:11:13,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:11:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:11:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:11:13,136 INFO L87 Difference]: Start difference. First operand 27 states and 33 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 20:11:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:13,294 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-16 20:11:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:11:13,294 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 17 [2022-11-16 20:11:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:13,297 INFO L225 Difference]: With dead ends: 42 [2022-11-16 20:11:13,297 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:11:13,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:11:13,299 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:13,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:11:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 20:11:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 20:11:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-16 20:11:13,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-11-16 20:11:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:13,309 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-16 20:11:13,309 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 20:11:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-16 20:11:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 20:11:13,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:13,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:13,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:13,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:13,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -72472683, now seen corresponding path program 7 times [2022-11-16 20:11:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:13,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346080597] [2022-11-16 20:11:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:13,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:11:13,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587902580] [2022-11-16 20:11:13,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:11:13,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:13,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:13,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:11:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:13,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 20:11:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:13,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-16 20:11:13,711 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 20:11:13,733 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 24 treesize of output 23 [2022-11-16 20:11:13,771 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 36 treesize of output 38 [2022-11-16 20:11:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:13,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-16 20:11:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:13,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:13,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-11-16 20:11:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:14,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2022-11-16 20:11:14,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 51 [2022-11-16 20:11:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-11-16 20:11:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2022-11-16 20:11:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-16 20:11:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:11:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-11-16 20:11:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:11:14,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-11-16 20:11:14,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 20:11:14,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2022-11-16 20:11:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:14,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:12:47,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:47,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346080597] [2022-11-16 20:12:47,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:12:47,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587902580] [2022-11-16 20:12:47,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587902580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:47,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960865918] [2022-11-16 20:12:47,063 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:12:47,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:47,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:12:47,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:12:47,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:12:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,165 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:12:47,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:12:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,263 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:12:47,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:12:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-16 20:12:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:12:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:12:47,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:12:47,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:12:47,514 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:12:47,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:12:47,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:12:47,665 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:12:47,665 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:12:47,751 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:12:47,751 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:12:47,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:12:47,823 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:12:47,824 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:12:47,900 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:12:47,900 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:12:47,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:12:47,951 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:12:47,951 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:12:48,033 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:12:48,034 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:12:48,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:12:51,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1559#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:12:51,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:12:51,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:12:51,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-16 20:12:51,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471352749] [2022-11-16 20:12:51,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:12:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:12:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1434, Unknown=10, NotChecked=0, Total=1560 [2022-11-16 20:12:51,255 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 20:13:15,892 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 123 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:13:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:23,684 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-16 20:13:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 20:13:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 20 [2022-11-16 20:13:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:23,685 INFO L225 Difference]: With dead ends: 45 [2022-11-16 20:13:23,685 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 20:13:23,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 121.3s TimeCoverageRelationStatistics Valid=151, Invalid=1817, Unknown=12, NotChecked=0, Total=1980 [2022-11-16 20:13:23,687 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:23,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 353 Invalid, 0 Unknown, 74 Unchecked, 5.6s Time] [2022-11-16 20:13:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 20:13:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-16 20:13:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 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 20:13:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-16 20:13:23,716 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-16 20:13:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:23,717 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-16 20:13:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 20:13:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-16 20:13:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 20:13:23,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:23,720 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:23,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:23,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1317708229, now seen corresponding path program 8 times [2022-11-16 20:13:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933990973] [2022-11-16 20:13:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:23,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:23,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206931183] [2022-11-16 20:13:23,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:13:23,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:23,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:23,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:13:24,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:13:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:13:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:13:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:13:24,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:13:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:13:24,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933990973] [2022-11-16 20:13:24,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206931183] [2022-11-16 20:13:24,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206931183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:13:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415708579] [2022-11-16 20:13:24,285 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:13:24,285 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:13:24,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:13:24,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:13:24,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,324 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:13:24,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:13:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,439 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:13:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:13:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:13:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:13:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:24,673 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:13:24,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:13:24,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:13:24,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:24,833 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:13:24,833 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:13:24,923 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:13:24,924 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:13:24,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:24,986 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:13:24,987 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:13:25,061 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:13:25,062 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:13:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:25,134 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:13:25,134 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:13:25,223 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:13:25,223 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:13:25,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:13:25,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1846#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:13:25,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:13:25,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:13:25,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:13:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605264647] [2022-11-16 20:13:25,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:13:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:13:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:13:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:13:25,715 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 20:13:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:26,022 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-16 20:13:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:13:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) Word has length 21 [2022-11-16 20:13:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:26,024 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:13:26,024 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 20:13:26,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:13:26,026 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:26,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:13:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 20:13:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-16 20:13:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 20:13:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-16 20:13:26,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-16 20:13:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:26,044 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-16 20:13:26,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 20:13:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-16 20:13:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 20:13:26,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:26,045 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:26,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:26,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:13:26,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2048008538, now seen corresponding path program 9 times [2022-11-16 20:13:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167303825] [2022-11-16 20:13:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:26,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:26,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997555301] [2022-11-16 20:13:26,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:13:26,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:26,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:26,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:13:26,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:13:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:13:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:13:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:13:26,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:13:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:13:26,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167303825] [2022-11-16 20:13:26,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997555301] [2022-11-16 20:13:26,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997555301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:13:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058685359] [2022-11-16 20:13:26,597 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:13:26,597 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:13:26,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:13:26,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:13:26,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,641 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:13:26,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:13:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,745 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:13:26,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:13:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,856 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:13:26,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:13:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:26,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:13:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:27,082 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:13:27,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:13:27,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:13:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:27,217 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:13:27,217 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:13:27,302 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:13:27,303 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:13:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:27,364 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:13:27,365 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:13:27,437 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:13:27,437 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:13:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:27,509 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:13:27,509 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:13:27,601 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:13:27,601 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:13:27,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:13:28,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2152#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:13:28,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:13:28,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:13:28,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:13:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703551586] [2022-11-16 20:13:28,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:13:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:13:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:13:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:13:28,080 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 20:13:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:13:28,292 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-16 20:13:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:13:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) Word has length 21 [2022-11-16 20:13:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:13:28,293 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:13:28,293 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 20:13:28,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-16 20:13:28,294 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:13:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:13:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 20:13:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 20:13:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 20:13:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-16 20:13:28,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-16 20:13:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:13:28,309 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-16 20:13:28,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 20:13:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-16 20:13:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:13:28,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:13:28,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:13:28,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 20:13:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:13:28,521 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:13:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:13:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash 992060457, now seen corresponding path program 10 times [2022-11-16 20:13:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:13:28,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538034470] [2022-11-16 20:13:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:13:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:13:28,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:13:28,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663814932] [2022-11-16 20:13:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:13:28,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:13:28,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:13:28,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:13:28,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:13:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:13:28,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-16 20:13:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:13:28,701 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 20:13:28,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:13:28,729 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 24 treesize of output 23 [2022-11-16 20:13:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,758 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 28 treesize of output 30 [2022-11-16 20:13:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-16 20:13:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:28,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-11-16 20:13:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-16 20:13:29,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-11-16 20:13:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-16 20:13:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-16 20:13:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 69 [2022-11-16 20:13:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-11-16 20:13:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 66 [2022-11-16 20:13:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 63 [2022-11-16 20:13:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:29,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 70 [2022-11-16 20:13:30,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:13:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 75 [2022-11-16 20:13:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:30,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 74 [2022-11-16 20:13:30,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 64 [2022-11-16 20:13:30,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 51 [2022-11-16 20:13:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:13:30,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:05,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:18:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538034470] [2022-11-16 20:18:05,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:18:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663814932] [2022-11-16 20:18:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663814932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502500121] [2022-11-16 20:18:05,997 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:18:05,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:18:05,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:18:05,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:18:05,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:18:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,032 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:18:06,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-16 20:18:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,133 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:18:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:18:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:18:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:18:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:06,359 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:18:06,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:18:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:18:06,554 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:18:06,554 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:18:06,627 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:18:06,627 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:18:06,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:06,695 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:18:06,695 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:18:06,774 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:18:06,775 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:18:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:06,827 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:18:06,828 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:18:06,894 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:18:06,895 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:18:06,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:18:16,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2485#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:18:16,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:18:16,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:18:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-11-16 20:18:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263359131] [2022-11-16 20:18:16,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:18:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 20:18:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:18:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 20:18:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2046, Unknown=68, NotChecked=0, Total=2256 [2022-11-16 20:18:16,113 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 20:18:57,197 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 144 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:19:00,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:19:02,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:19:03,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:19:06,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:19:07,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:19:12,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:20:19,612 WARN L233 SmtUtils]: Spent 15.34s on a formula simplification. DAG size of input: 181 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:21:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:44,614 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-11-16 20:21:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 20:21:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 24 [2022-11-16 20:21:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:44,616 INFO L225 Difference]: With dead ends: 54 [2022-11-16 20:21:44,616 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 20:21:44,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 459.1s TimeCoverageRelationStatistics Valid=189, Invalid=2576, Unknown=97, NotChecked=0, Total=2862 [2022-11-16 20:21:44,617 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:44,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 579 Invalid, 1 Unknown, 107 Unchecked, 29.0s Time] [2022-11-16 20:21:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 20:21:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-16 20:21:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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 20:21:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-16 20:21:44,640 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-11-16 20:21:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-16 20:21:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 20:21:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-16 20:21:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:21:44,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:44,646 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:44,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:44,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1216276529, now seen corresponding path program 11 times [2022-11-16 20:21:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:44,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674784767] [2022-11-16 20:21:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:44,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:44,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549649491] [2022-11-16 20:21:44,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:21:44,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:44,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:44,878 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:44,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:21:45,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:21:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:21:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:45,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:45,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:45,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674784767] [2022-11-16 20:21:45,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:45,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549649491] [2022-11-16 20:21:45,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549649491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:45,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738149945] [2022-11-16 20:21:45,635 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:21:45,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:45,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:45,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:45,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,747 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:21:45,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:21:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:21:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-16 20:21:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-16 20:21:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:45,968 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:21:45,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-16 20:21:46,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:21:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:46,122 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:21:46,123 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:21:46,194 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:21:46,195 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:21:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:46,254 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:21:46,254 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:21:46,328 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:21:46,328 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:21:46,373 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:21:46,374 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 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:21:46,450 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:21:46,450 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:21:46,475 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:47,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2831#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:21:47,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:47,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:21:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885231982] [2022-11-16 20:21:47,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:21:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:21:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:21:47,012 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 20:21:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:47,488 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-16 20:21:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:21:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 25 [2022-11-16 20:21:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:47,489 INFO L225 Difference]: With dead ends: 61 [2022-11-16 20:21:47,489 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 20:21:47,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:21:47,491 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:47,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:21:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 20:21:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-11-16 20:21:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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 20:21:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-16 20:21:47,525 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-11-16 20:21:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:47,525 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-16 20:21:47,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 20:21:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-16 20:21:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:21:47,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:47,526 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:47,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 20:21:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 20:21:47,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 688797510, now seen corresponding path program 12 times [2022-11-16 20:21:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:47,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125150248] [2022-11-16 20:21:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:47,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:47,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:47,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139808296] [2022-11-16 20:21:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:21:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:47,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:47,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:21:47,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:21:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:21:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:48,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:48,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125150248] [2022-11-16 20:21:48,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:48,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139808296] [2022-11-16 20:21:48,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139808296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199888275] [2022-11-16 20:21:48,190 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:21:48,190 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:48,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:48,191 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:48,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,315 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:21:48,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:21:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-16 20:21:48,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:21:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-16 20:21:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:48,550 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:21:48,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-16 20:21:48,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-16 20:21:48,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:48,744 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:21:48,745 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:21:48,820 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:21:48,820 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:21:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:48,896 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:21:48,896 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 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:21:48,985 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:21:48,986 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 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:21:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:49,055 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:21:49,056 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 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:21:49,155 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:21:49,155 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 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:21:49,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:50,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3198#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:21:50,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:50,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:50,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:21:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56403655] [2022-11-16 20:21:50,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:21:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:21:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:21:50,291 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 20:21:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:50,618 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-16 20:21:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:21:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 25 [2022-11-16 20:21:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:50,619 INFO L225 Difference]: With dead ends: 60 [2022-11-16 20:21:50,619 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 20:21:50,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:21:50,620 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:50,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:21:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 20:21:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-16 20:21:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 20:21:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-16 20:21:50,638 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-16 20:21:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:50,639 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-16 20:21:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 20:21:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-16 20:21:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:21:50,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:50,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:50,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:50,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 20:21:50,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:50,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1689346091, now seen corresponding path program 13 times [2022-11-16 20:21:50,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954511886] [2022-11-16 20:21:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:50,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:50,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22899179] [2022-11-16 20:21:50,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:21:50,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:50,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:50,871 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:50,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b59cf1ef-56a4-4140-985e-55d2b89ee529/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:21:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:21:51,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-16 20:21:51,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:51,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-16 20:21:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,166 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 19 treesize of output 18 [2022-11-16 20:21:51,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,215 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 28 treesize of output 30 [2022-11-16 20:21:51,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-16 20:21:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-16 20:21:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-11-16 20:21:51,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-16 20:21:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 79 [2022-11-16 20:21:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-16 20:21:52,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-11-16 20:21:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-11-16 20:21:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2022-11-16 20:21:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-11-16 20:21:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-11-16 20:21:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-16 20:21:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-11-16 20:21:53,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:53,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-16 20:21:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-11-16 20:21:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-11-16 20:21:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-16 20:21:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:53,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 66 [2022-11-16 20:21:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:54,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 50 [2022-11-16 20:21:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:21:54,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:45,099 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse25 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse25))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse12 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse16 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16)) (.cse15 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse6 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15)) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse11 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse13 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse17 (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse5 .cse6 .cse8 .cse11 .cse12))))) (let ((.cse19 (select .cse17 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse18 (let ((.cse20 (let ((.cse21 (let ((.cse22 (store .cse19 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse8 .cse11 .cse12)))) (store .cse22 .cse16 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse16)))))) (store .cse21 .cse15 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse15)))))) (store .cse20 .cse14 (+ (select .cse19 .cse14) (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse18 .cse13 (+ (select (select (store .cse17 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse19 .cse13))))))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse9 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse7 .cse8 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse16))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse5 .cse6 .cse7 .cse8 .cse9 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse10 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse5 .cse6 .cse7 .cse8 .cse9 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (+ .cse0 .cse1 .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12))))))))))))))))))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false