./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 6b4ec56b 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_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 20:01:23,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:01:23,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:01:23,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:01:23,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:01:23,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:01:23,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:01:23,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:01:23,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:01:23,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:01:23,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:01:23,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:01:23,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:01:23,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:01:23,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:01:23,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:01:23,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:01:23,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:01:23,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:01:23,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:01:23,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:01:23,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:01:23,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:01:23,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:01:23,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:01:23,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:01:23,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:01:23,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:01:23,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:01:23,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:01:23,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:01:23,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:01:23,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:01:23,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:01:23,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:01:23,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:01:23,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:01:23,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:01:23,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:01:23,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:01:23,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:01:23,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:01:23,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:01:23,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:01:23,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:01:23,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:01:23,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:01:23,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:01:23,666 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:01:23,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:01:23,666 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:01:23,666 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:01:23,667 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:01:23,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:01:23,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:01:23,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:01:23,668 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:01:23,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:01:23,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:01:23,669 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:01:23,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:01:23,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:01:23,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:01:23,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:01:23,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:01:23,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:01:23,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:01:23,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:01:23,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:01:23,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:01:23,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:01:23,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:01:23,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:01:23,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:01:23,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:23,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:01:23,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:01:23,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:01:23,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:01:23,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:01:23,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:01:23,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:01:23,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:01:23,680 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_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2022-11-20 20:01:23,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:01:23,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:01:23,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:01:23,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:01:23,968 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:01:23,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-fpi/ss1.c [2022-11-20 20:01:27,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:01:27,207 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:01:27,207 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/sv-benchmarks/c/array-fpi/ss1.c [2022-11-20 20:01:27,214 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/data/d49a22b19/297c2fb74c8042ffb19db3cadb6d9db3/FLAGa212edda2 [2022-11-20 20:01:27,233 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/data/d49a22b19/297c2fb74c8042ffb19db3cadb6d9db3 [2022-11-20 20:01:27,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:01:27,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:01:27,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:27,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:01:27,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:01:27,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59022d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27, skipping insertion in model container [2022-11-20 20:01:27,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:01:27,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:01:27,415 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-20 20:01:27,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:27,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:01:27,460 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-20 20:01:27,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:27,483 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:01:27,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27 WrapperNode [2022-11-20 20:01:27,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:27,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:27,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:01:27,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:01:27,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,521 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-11-20 20:01:27,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:27,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:01:27,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:01:27,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:01:27,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,551 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:01:27,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:01:27,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:01:27,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:01:27,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (1/1) ... [2022-11-20 20:01:27,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:27,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:27,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:01:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:01:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:01:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:01:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:01:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:01:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:01:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:01:27,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:01:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:01:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:01:27,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:01:27,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:01:28,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:01:28,088 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:01:28,088 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 20:01:28,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:28 BoogieIcfgContainer [2022-11-20 20:01:28,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:01:28,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:01:28,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:01:28,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:01:28,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:01:27" (1/3) ... [2022-11-20 20:01:28,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@887756f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:28, skipping insertion in model container [2022-11-20 20:01:28,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:27" (2/3) ... [2022-11-20 20:01:28,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@887756f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:28, skipping insertion in model container [2022-11-20 20:01:28,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:28" (3/3) ... [2022-11-20 20:01:28,115 INFO L112 eAbstractionObserver]: Analyzing ICFG ss1.c [2022-11-20 20:01:28,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:01:28,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:01:28,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:01:28,200 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;@3816f884, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:01:28,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:01:28,205 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) [2022-11-20 20:01:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:01:28,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:28,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:28,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 581057961, now seen corresponding path program 1 times [2022-11-20 20:01:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11706098] [2022-11-20 20:01:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:28,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11706098] [2022-11-20 20:01:28,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 20:01:28,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99602932] [2022-11-20 20:01:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:28,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:28,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:28,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:01:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:01:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:28,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:28,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99602932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:28,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:28,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:01:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591296710] [2022-11-20 20:01:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:28,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:01:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:01:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:01:28,716 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) [2022-11-20 20:01:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:28,773 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-20 20:01:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:01:28,780 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 [2022-11-20 20:01:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:28,789 INFO L225 Difference]: With dead ends: 22 [2022-11-20 20:01:28,789 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 20:01:28,792 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 [2022-11-20 20:01:28,797 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 [2022-11-20 20:01:28,800 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] [2022-11-20 20:01:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 20:01:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 20:01:28,833 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) [2022-11-20 20:01:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-20 20:01:28,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-20 20:01:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:28,835 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-20 20:01:28,836 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) [2022-11-20 20:01:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-20 20:01:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:01:28,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:28,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:28,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:01:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 20:01:29,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash 431603023, now seen corresponding path program 1 times [2022-11-20 20:01:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:29,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139914032] [2022-11-20 20:01:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:29,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:01:29,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624588034] [2022-11-20 20:01:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:29,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:29,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:29,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:29,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:01:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:01:29,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:01:29,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:29,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139914032] [2022-11-20 20:01:29,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:01:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624588034] [2022-11-20 20:01:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624588034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:29,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:29,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:01:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052743710] [2022-11-20 20:01:29,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:01:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:01:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:01:29,185 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) [2022-11-20 20:01:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:29,248 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-20 20:01:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:01:29,249 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 [2022-11-20 20:01:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:29,249 INFO L225 Difference]: With dead ends: 18 [2022-11-20 20:01:29,250 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:01:29,250 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 [2022-11-20 20:01:29,251 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:29,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:01:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 20:01:29,255 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) [2022-11-20 20:01:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-20 20:01:29,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-20 20:01:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:29,256 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-20 20:01:29,257 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) [2022-11-20 20:01:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-20 20:01:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:01:29,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:29,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:29,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:29,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:29,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash 792964949, now seen corresponding path program 1 times [2022-11-20 20:01:29,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869641675] [2022-11-20 20:01:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:29,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:01:29,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912590817] [2022-11-20 20:01:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:29,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:29,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:29,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:01:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 20:01:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:29,685 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 [2022-11-20 20:01:29,702 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 [2022-11-20 20:01:29,742 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 [2022-11-20 20:01:29,848 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 [2022-11-20 20:01:29,947 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 [2022-11-20 20:01:30,088 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 [2022-11-20 20:01:30,187 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 [2022-11-20 20:01:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:30,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:30,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869641675] [2022-11-20 20:01:30,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:01:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912590817] [2022-11-20 20:01:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912590817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:30,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097188151] [2022-11-20 20:01:30,792 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:01:30,793 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:30,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:30,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:30,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:30,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:30,905 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:01:30,905 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 [2022-11-20 20:01:30,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,030 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:01:31,030 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 [2022-11-20 20:01:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,072 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 [2022-11-20 20:01:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,198 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 [2022-11-20 20:01:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:31,510 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:01:31,516 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 [2022-11-20 20:01:31,703 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 [2022-11-20 20:01:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:31,794 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:31,794 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 [2022-11-20 20:01:31,903 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:31,903 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 [2022-11-20 20:01:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,004 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:32,004 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 [2022-11-20 20:01:32,120 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:01:32,121 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 [2022-11-20 20:01:32,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:32,210 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:01:32,210 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 [2022-11-20 20:01:32,299 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:32,299 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 [2022-11-20 20:01:32,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:32,932 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 [2022-11-20 20:01:32,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:32,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-20 20:01:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302049800] [2022-11-20 20:01:32,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:32,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:01:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:01:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:01:32,935 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) [2022-11-20 20:01:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:33,460 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-20 20:01:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:01:33,462 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 [2022-11-20 20:01:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:33,463 INFO L225 Difference]: With dead ends: 27 [2022-11-20 20:01:33,463 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 20:01:33,464 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 [2022-11-20 20:01:33,465 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 [2022-11-20 20:01:33,465 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] [2022-11-20 20:01:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 20:01:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-20 20:01:33,472 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) [2022-11-20 20:01:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-20 20:01:33,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-20 20:01:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:33,473 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-20 20:01:33,473 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) [2022-11-20 20:01:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-20 20:01:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:01:33,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:33,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:33,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 20:01:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:33,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash -911807493, now seen corresponding path program 2 times [2022-11-20 20:01:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:33,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606593264] [2022-11-20 20:01:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:33,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:01:33,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564260816] [2022-11-20 20:01:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:01:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:33,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:33,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:01:33,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:01:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:01:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:01:33,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:01:33,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606593264] [2022-11-20 20:01:33,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:01:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564260816] [2022-11-20 20:01:33,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564260816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535897797] [2022-11-20 20:01:33,917 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:01:33,917 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:33,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:33,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:33,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,023 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:01:34,024 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 [2022-11-20 20:01:34,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,128 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:01:34,128 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 [2022-11-20 20:01:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,173 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 [2022-11-20 20:01:34,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,218 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 [2022-11-20 20:01:34,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:34,413 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:01:34,413 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 [2022-11-20 20:01:34,525 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 [2022-11-20 20:01:34,588 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:34,589 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 [2022-11-20 20:01:34,672 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:34,673 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 [2022-11-20 20:01:34,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:34,757 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:34,758 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 [2022-11-20 20:01:34,841 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:01:34,842 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 [2022-11-20 20:01:34,891 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:34,892 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 [2022-11-20 20:01:34,961 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:34,961 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 [2022-11-20 20:01:34,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:35,404 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 [2022-11-20 20:01:35,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:35,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:35,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 20:01:35,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572626086] [2022-11-20 20:01:35,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:35,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:01:35,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:01:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:01:35,406 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) [2022-11-20 20:01:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:35,557 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-20 20:01:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:35,557 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 [2022-11-20 20:01:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:35,558 INFO L225 Difference]: With dead ends: 31 [2022-11-20 20:01:35,558 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 20:01:35,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:01:35,559 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 [2022-11-20 20:01:35,560 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] [2022-11-20 20:01:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 20:01:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-20 20:01:35,566 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) [2022-11-20 20:01:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-20 20:01:35,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-20 20:01:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:35,567 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-20 20:01:35,568 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) [2022-11-20 20:01:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-20 20:01:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:01:35,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:35,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:35,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 20:01:35,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:35,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1188195942, now seen corresponding path program 3 times [2022-11-20 20:01:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723487252] [2022-11-20 20:01:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:35,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:01:35,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033274940] [2022-11-20 20:01:35,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:01:35,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:35,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:35,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:35,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:01:35,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:01:35,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:01:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:01:35,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:01:35,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723487252] [2022-11-20 20:01:35,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:01:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033274940] [2022-11-20 20:01:35,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033274940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650518133] [2022-11-20 20:01:35,980 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:01:35,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:35,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:35,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:35,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,090 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:01:36,092 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 [2022-11-20 20:01:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,113 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 [2022-11-20 20:01:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,131 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 [2022-11-20 20:01:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,175 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 [2022-11-20 20:01:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:36,365 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:01:36,366 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 [2022-11-20 20:01:36,463 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 [2022-11-20 20:01:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:36,543 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:36,544 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 [2022-11-20 20:01:36,617 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:36,617 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 [2022-11-20 20:01:36,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:36,698 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:36,698 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 [2022-11-20 20:01:36,785 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:01:36,785 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 [2022-11-20 20:01:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:36,853 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:01:36,854 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 [2022-11-20 20:01:36,939 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:36,939 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 [2022-11-20 20:01:36,973 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:37,353 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 [2022-11-20 20:01:37,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:37,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:37,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 20:01:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274989107] [2022-11-20 20:01:37,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:01:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:01:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:01:37,355 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) [2022-11-20 20:01:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:37,454 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-20 20:01:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:01:37,454 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 [2022-11-20 20:01:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:37,455 INFO L225 Difference]: With dead ends: 33 [2022-11-20 20:01:37,455 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 20:01:37,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:01:37,456 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 [2022-11-20 20:01:37,456 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] [2022-11-20 20:01:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 20:01:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 20:01:37,462 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) [2022-11-20 20:01:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-20 20:01:37,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-20 20:01:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:37,462 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-20 20:01:37,463 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) [2022-11-20 20:01:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-20 20:01:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:01:37,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:37,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:37,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:37,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:37,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1993429225, now seen corresponding path program 4 times [2022-11-20 20:01:37,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119294577] [2022-11-20 20:01:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:37,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:37,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:01:37,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478052908] [2022-11-20 20:01:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:01:37,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:37,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:37,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:37,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:01:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:37,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 20:01:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:37,863 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 [2022-11-20 20:01:37,870 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 [2022-11-20 20:01:37,893 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 [2022-11-20 20:01:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:37,934 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 [2022-11-20 20:01:38,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:38,012 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 [2022-11-20 20:01:38,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:38,057 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 [2022-11-20 20:01:38,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:38,157 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 [2022-11-20 20:01:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:38,212 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 [2022-11-20 20:01:38,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:38,337 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 [2022-11-20 20:01:38,387 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 [2022-11-20 20:01:38,458 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 [2022-11-20 20:01:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:38,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:54,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119294577] [2022-11-20 20:01:54,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:01:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478052908] [2022-11-20 20:01:54,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478052908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483845848] [2022-11-20 20:01:54,642 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:01:54,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:54,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:54,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:54,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,751 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:01:54,752 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 [2022-11-20 20:01:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,790 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:01:54,791 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 [2022-11-20 20:01:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,898 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:01:54,898 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 [2022-11-20 20:01:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:54,949 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 [2022-11-20 20:01:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,132 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:01:55,133 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 [2022-11-20 20:01:55,328 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 [2022-11-20 20:01:55,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,366 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:01:55,366 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 [2022-11-20 20:01:55,431 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:55,432 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 [2022-11-20 20:01:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,500 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:01:55,501 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 [2022-11-20 20:01:55,572 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:01:55,572 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 [2022-11-20 20:01:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,621 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:01:55,621 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 [2022-11-20 20:01:55,697 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:01:55,697 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 [2022-11-20 20:01:55,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:57,277 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 [2022-11-20 20:01:57,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:57,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-20 20:01:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606499266] [2022-11-20 20:01:57,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 20:01:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 20:01:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=898, Unknown=3, NotChecked=0, Total=992 [2022-11-20 20:01:57,279 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) [2022-11-20 20:02:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:02,466 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-20 20:02:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:02:02,467 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 [2022-11-20 20:02:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:02,467 INFO L225 Difference]: With dead ends: 36 [2022-11-20 20:02:02,467 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 20:02:02,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=116, Invalid=1141, Unknown=3, NotChecked=0, Total=1260 [2022-11-20 20:02:02,469 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, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:02,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 236 Invalid, 0 Unknown, 36 Unchecked, 1.4s Time] [2022-11-20 20:02:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 20:02:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-20 20:02:02,478 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) [2022-11-20 20:02:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-20 20:02:02,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-11-20 20:02:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:02,479 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-20 20:02:02,480 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) [2022-11-20 20:02:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-20 20:02:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:02:02,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:02,480 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 20:02:02,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:02,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2119813775, now seen corresponding path program 5 times [2022-11-20 20:02:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713094419] [2022-11-20 20:02:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:02,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:02,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:02:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998846123] [2022-11-20 20:02:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:02:02,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:02,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:02,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:02:02,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:02:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:02:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:02:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:02:02,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:02:02,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713094419] [2022-11-20 20:02:02,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:02:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998846123] [2022-11-20 20:02:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998846123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814257422] [2022-11-20 20:02:02,970 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:02:02,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:02,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:02,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:02,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,067 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:02:03,068 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 [2022-11-20 20:02:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,104 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:02:03,105 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 [2022-11-20 20:02:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,218 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:02:03,219 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 [2022-11-20 20:02:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,258 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 [2022-11-20 20:02:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:03,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:03,460 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:02:03,460 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 [2022-11-20 20:02:03,627 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 [2022-11-20 20:02:03,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:03,669 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:02:03,669 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 [2022-11-20 20:02:03,740 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:02:03,740 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 [2022-11-20 20:02:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:03,813 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:02:03,813 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 [2022-11-20 20:02:03,900 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:02:03,901 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 [2022-11-20 20:02:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:03,967 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:02:03,968 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 [2022-11-20 20:02:04,080 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:02:04,081 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 [2022-11-20 20:02:04,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:04,620 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 [2022-11-20 20:02:04,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:04,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:04,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 20:02:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786631870] [2022-11-20 20:02:04,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:02:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:02:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:02:04,622 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) [2022-11-20 20:02:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:04,809 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-20 20:02:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:02:04,809 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 [2022-11-20 20:02:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:04,810 INFO L225 Difference]: With dead ends: 41 [2022-11-20 20:02:04,810 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 20:02:04,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:02:04,811 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 [2022-11-20 20:02:04,812 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] [2022-11-20 20:02:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 20:02:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-20 20:02:04,822 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) [2022-11-20 20:02:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-20 20:02:04,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-11-20 20:02:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:04,824 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-20 20:02:04,824 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) [2022-11-20 20:02:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-20 20:02:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:02:04,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:04,825 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:04,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:02:05,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:05,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1666458246, now seen corresponding path program 6 times [2022-11-20 20:02:05,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:05,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877869292] [2022-11-20 20:02:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:05,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:02:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51048741] [2022-11-20 20:02:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:02:05,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:05,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:05,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:02:05,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:02:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:02:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:02:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:02:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:02:05,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877869292] [2022-11-20 20:02:05,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:02:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51048741] [2022-11-20 20:02:05,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51048741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893560120] [2022-11-20 20:02:05,268 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:02:05,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:05,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:05,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:05,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,306 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:02:05,306 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 [2022-11-20 20:02:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,401 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:02:05,401 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 [2022-11-20 20:02:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,510 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:02:05,511 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 [2022-11-20 20:02:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,555 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 [2022-11-20 20:02:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,739 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:02:05,740 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 [2022-11-20 20:02:05,827 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 [2022-11-20 20:02:05,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:05,880 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:02:05,880 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 [2022-11-20 20:02:05,955 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:02:05,956 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 [2022-11-20 20:02:05,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:06,016 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:02:06,017 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 [2022-11-20 20:02:06,082 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:02:06,083 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 [2022-11-20 20:02:06,130 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:02:06,130 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 [2022-11-20 20:02:06,202 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:02:06,202 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 [2022-11-20 20:02:06,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:06,618 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 [2022-11-20 20:02:06,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:06,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:06,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 20:02:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420690577] [2022-11-20 20:02:06,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:02:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:02:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:02:06,619 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) [2022-11-20 20:02:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:06,740 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-20 20:02:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:02:06,741 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 [2022-11-20 20:02:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:06,741 INFO L225 Difference]: With dead ends: 42 [2022-11-20 20:02:06,742 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 20:02:06,742 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 [2022-11-20 20:02:06,743 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 [2022-11-20 20:02:06,743 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] [2022-11-20 20:02:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 20:02:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 20:02:06,750 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) [2022-11-20 20:02:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-20 20:02:06,750 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-11-20 20:02:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-20 20:02:06,751 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) [2022-11-20 20:02:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-20 20:02:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 20:02:06,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:06,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:06,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:06,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:06,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash -72472683, now seen corresponding path program 7 times [2022-11-20 20:02:06,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:06,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987605671] [2022-11-20 20:02:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:06,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:02:06,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146461654] [2022-11-20 20:02:06,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:02:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:06,987 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:07,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:02:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:07,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 20:02:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:07,141 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 [2022-11-20 20:02:07,146 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 [2022-11-20 20:02:07,164 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 [2022-11-20 20:02:07,194 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 [2022-11-20 20:02:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,234 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 [2022-11-20 20:02:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,346 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 [2022-11-20 20:02:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:07,417 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 [2022-11-20 20:02:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,498 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 [2022-11-20 20:02:07,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,623 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 [2022-11-20 20:02:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,690 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 [2022-11-20 20:02:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,766 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 [2022-11-20 20:02:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,902 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 [2022-11-20 20:02:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,979 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 [2022-11-20 20:02:08,066 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 [2022-11-20 20:02:08,167 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 [2022-11-20 20:02:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:02:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:23,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:23,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987605671] [2022-11-20 20:03:23,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:03:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146461654] [2022-11-20 20:03:23,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146461654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203295061] [2022-11-20 20:03:23,824 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:03:23,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:03:23,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:03:23,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:03:23,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:03:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:23,915 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:03:23,916 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 [2022-11-20 20:03:23,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:23,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:23,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,007 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:03:24,007 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 [2022-11-20 20:03:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,044 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 [2022-11-20 20:03:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,093 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 [2022-11-20 20:03:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:24,271 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:03:24,272 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 [2022-11-20 20:03:24,365 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 [2022-11-20 20:03:24,406 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:03:24,406 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 [2022-11-20 20:03:24,476 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:03:24,476 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 [2022-11-20 20:03:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:24,564 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:03:24,565 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 [2022-11-20 20:03:24,631 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:03:24,631 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 [2022-11-20 20:03:24,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:24,677 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:03:24,677 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 [2022-11-20 20:03:24,746 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:03:24,746 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 [2022-11-20 20:03:24,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:28,241 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 [2022-11-20 20:03:28,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:28,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-20 20:03:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847076539] [2022-11-20 20:03:28,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 20:03:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 20:03:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1435, Unknown=9, NotChecked=0, Total=1560 [2022-11-20 20:03:28,244 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) [2022-11-20 20:03:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:59,830 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-20 20:03:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:03:59,831 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 [2022-11-20 20:03:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:59,832 INFO L225 Difference]: With dead ends: 45 [2022-11-20 20:03:59,832 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 20:03:59,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=151, Invalid=1817, Unknown=12, NotChecked=0, Total=1980 [2022-11-20 20:03:59,834 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s 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, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:59,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 353 Invalid, 0 Unknown, 74 Unchecked, 6.8s Time] [2022-11-20 20:03:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 20:03:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-20 20:03:59,850 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) [2022-11-20 20:03:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-20 20:03:59,850 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-20 20:03:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:59,851 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-20 20:03:59,866 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) [2022-11-20 20:03:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-20 20:03:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:03:59,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:59,867 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:59,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 20:04:00,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:04:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1317708229, now seen corresponding path program 8 times [2022-11-20 20:04:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:04:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031230620] [2022-11-20 20:04:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:00,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:04:00,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:04:00,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803974756] [2022-11-20 20:04:00,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:00,096 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:00,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:04:00,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:04:00,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:04:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:04:00,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:04:00,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:04:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031230620] [2022-11-20 20:04:00,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:04:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803974756] [2022-11-20 20:04:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803974756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550687601] [2022-11-20 20:04:00,495 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:04:00,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:04:00,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:04:00,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:04:00,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:04:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,535 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:04:00,535 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 [2022-11-20 20:04:00,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,630 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:04:00,631 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 [2022-11-20 20:04:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,649 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 [2022-11-20 20:04:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,684 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 [2022-11-20 20:04:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:00,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:00,862 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:04:00,863 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 [2022-11-20 20:04:00,950 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 [2022-11-20 20:04:00,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:01,010 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:04:01,010 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 [2022-11-20 20:04:01,091 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:04:01,091 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 [2022-11-20 20:04:01,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:01,165 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:04:01,165 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 [2022-11-20 20:04:01,271 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:04:01,272 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 [2022-11-20 20:04:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:01,360 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:04:01,361 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 34 [2022-11-20 20:04:01,456 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:04:01,456 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 [2022-11-20 20:04:01,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:04:01,978 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 [2022-11-20 20:04:01,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:04:01,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:04:01,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-20 20:04:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840804391] [2022-11-20 20:04:01,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:04:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:04:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:04:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:04:01,980 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) [2022-11-20 20:04:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:02,277 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-20 20:04:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:04:02,277 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 [2022-11-20 20:04:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:02,278 INFO L225 Difference]: With dead ends: 51 [2022-11-20 20:04:02,278 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 20:04:02,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:04:02,279 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 [2022-11-20 20:04:02,280 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] [2022-11-20 20:04:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 20:04:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-20 20:04:02,294 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) [2022-11-20 20:04:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-20 20:04:02,294 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-20 20:04:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:02,294 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-20 20:04:02,294 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) [2022-11-20 20:04:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-20 20:04:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:04:02,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:02,295 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:02,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:02,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:02,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:04:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2048008538, now seen corresponding path program 9 times [2022-11-20 20:04:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:04:02,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459651229] [2022-11-20 20:04:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:04:02,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:04:02,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858986203] [2022-11-20 20:04:02,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:04:02,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:02,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:02,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:02,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:04:02,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:04:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:04:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:04:02,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:04:02,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:04:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459651229] [2022-11-20 20:04:02,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:04:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858986203] [2022-11-20 20:04:02,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858986203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902572227] [2022-11-20 20:04:02,803 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:04:02,804 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:04:02,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:04:02,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:04:02,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:04:02,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,850 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:04:02,850 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 [2022-11-20 20:04:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,938 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-20 20:04:02,939 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 [2022-11-20 20:04:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,058 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:04:03,058 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 [2022-11-20 20:04:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,100 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 [2022-11-20 20:04:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:03,270 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:04:03,270 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 [2022-11-20 20:04:03,357 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 [2022-11-20 20:04:03,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:03,413 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:04:03,413 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 [2022-11-20 20:04:03,493 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:04:03,493 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 [2022-11-20 20:04:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:03,560 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:04:03,560 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 [2022-11-20 20:04:03,640 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:04:03,641 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 [2022-11-20 20:04:03,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:03,710 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:04:03,710 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 [2022-11-20 20:04:03,786 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:04:03,787 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 [2022-11-20 20:04:03,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:04:04,286 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 [2022-11-20 20:04:04,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:04:04,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:04:04,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-20 20:04:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40171773] [2022-11-20 20:04:04,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:04,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:04:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:04:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:04:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:04:04,288 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) [2022-11-20 20:04:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:04,523 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-20 20:04:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:04:04,524 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 [2022-11-20 20:04:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:04,525 INFO L225 Difference]: With dead ends: 51 [2022-11-20 20:04:04,525 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:04:04,525 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 [2022-11-20 20:04:04,526 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 [2022-11-20 20:04:04,527 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] [2022-11-20 20:04:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:04:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 20:04:04,540 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) [2022-11-20 20:04:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-20 20:04:04,541 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-20 20:04:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-20 20:04:04,541 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) [2022-11-20 20:04:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-20 20:04:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:04:04,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:04,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:04,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:04,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:04:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 992060457, now seen corresponding path program 10 times [2022-11-20 20:04:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:04:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910749997] [2022-11-20 20:04:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:04:04,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:04:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218221673] [2022-11-20 20:04:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:04:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:04,806 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:04,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:04:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:04,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-20 20:04:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:04,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 20:04:04,971 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 [2022-11-20 20:04:04,999 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 [2022-11-20 20:04:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,029 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 [2022-11-20 20:04:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,097 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 [2022-11-20 20:04:05,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,163 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 [2022-11-20 20:04:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,295 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 [2022-11-20 20:04:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,376 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 [2022-11-20 20:04:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,476 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 [2022-11-20 20:04:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,587 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 [2022-11-20 20:04:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,785 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 [2022-11-20 20:04:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,886 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 [2022-11-20 20:04:05,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,993 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 [2022-11-20 20:04:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,113 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 [2022-11-20 20:04:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,303 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 [2022-11-20 20:04:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:04:06,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,431 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 [2022-11-20 20:04:06,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:06,548 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 [2022-11-20 20:04:06,675 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 [2022-11-20 20:04:06,805 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 [2022-11-20 20:04:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:06,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:58,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910749997] [2022-11-20 20:08:58,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:08:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218221673] [2022-11-20 20:08:58,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218221673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228883513] [2022-11-20 20:08:58,593 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:08:58,593 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:08:58,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:08:58,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:08:58,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:08:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,646 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:08:58,647 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 [2022-11-20 20:08:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,796 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:08:58,797 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 [2022-11-20 20:08:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,822 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 [2022-11-20 20:08:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:58,887 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 [2022-11-20 20:08:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:59,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:08:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:08:59,118 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:08:59,119 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 [2022-11-20 20:08:59,285 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 [2022-11-20 20:08:59,337 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:08:59,337 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 [2022-11-20 20:08:59,424 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:08:59,424 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 [2022-11-20 20:08:59,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:08:59,513 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:08:59,513 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 [2022-11-20 20:08:59,614 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:08:59,615 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 [2022-11-20 20:08:59,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:08:59,685 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:08:59,686 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 [2022-11-20 20:08:59,827 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:08:59,828 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 54 [2022-11-20 20:08:59,864 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:09:12,722 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 [2022-11-20 20:09:12,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:09:12,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:09:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-11-20 20:09:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776467428] [2022-11-20 20:09:12,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 20:09:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 20:09:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2053, Unknown=61, NotChecked=0, Total=2256 [2022-11-20 20:09:12,725 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) [2022-11-20 20:09:56,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:09:58,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:10:01,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:10:03,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:10:05,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:11:18,018 WARN L233 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 181 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:11:20,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:11:55,360 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 156 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:12:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:33,226 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-11-20 20:12:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 20:12:33,228 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 [2022-11-20 20:12:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:33,228 INFO L225 Difference]: With dead ends: 54 [2022-11-20 20:12:33,228 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 20:12:33,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 461.6s TimeCoverageRelationStatistics Valid=189, Invalid=2581, Unknown=92, NotChecked=0, Total=2862 [2022-11-20 20:12:33,230 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:33,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 577 Invalid, 2 Unknown, 107 Unchecked, 35.1s Time] [2022-11-20 20:12:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 20:12:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-20 20:12:33,257 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) [2022-11-20 20:12:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-20 20:12:33,258 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-11-20 20:12:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:33,258 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-20 20:12:33,259 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) [2022-11-20 20:12:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-20 20:12:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 20:12:33,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:33,260 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:33,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:33,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:33,461 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:12:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1216276529, now seen corresponding path program 11 times [2022-11-20 20:12:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:12:33,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323318794] [2022-11-20 20:12:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:12:33,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:12:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955975785] [2022-11-20 20:12:33,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:33,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:33,528 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:33,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:12:33,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:12:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:12:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:12:34,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:12:34,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:12:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323318794] [2022-11-20 20:12:34,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:12:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955975785] [2022-11-20 20:12:34,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955975785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211258036] [2022-11-20 20:12:34,323 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:12:34,323 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:12:34,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:12:34,324 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:12:34,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:12:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,460 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:12:34,460 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 [2022-11-20 20:12:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,488 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 [2022-11-20 20:12:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,507 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 [2022-11-20 20:12:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,560 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 [2022-11-20 20:12:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:34,736 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-20 20:12:34,737 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 [2022-11-20 20:12:34,834 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 [2022-11-20 20:12:34,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:34,920 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:12:34,920 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 [2022-11-20 20:12:35,016 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:12:35,017 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 [2022-11-20 20:12:35,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:35,108 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:12:35,108 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 [2022-11-20 20:12:35,202 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:12:35,202 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 [2022-11-20 20:12:35,267 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:12:35,267 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 [2022-11-20 20:12:35,367 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:12:35,367 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 [2022-11-20 20:12:35,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:12:35,991 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 [2022-11-20 20:12:35,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:12:35,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:12:35,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-20 20:12:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419259154] [2022-11-20 20:12:35,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:35,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 20:12:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:12:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 20:12:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:12:35,994 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) [2022-11-20 20:12:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:36,483 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-20 20:12:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:12:36,484 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 [2022-11-20 20:12:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:36,485 INFO L225 Difference]: With dead ends: 61 [2022-11-20 20:12:36,485 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 20:12:36,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-20 20:12:36,486 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 [2022-11-20 20:12:36,486 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] [2022-11-20 20:12:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 20:12:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-11-20 20:12:36,524 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) [2022-11-20 20:12:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-20 20:12:36,525 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-11-20 20:12:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:36,526 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-20 20:12:36,526 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) [2022-11-20 20:12:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-20 20:12:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 20:12:36,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:36,527 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:36,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:36,736 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:12:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash 688797510, now seen corresponding path program 12 times [2022-11-20 20:12:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:12:36,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413579656] [2022-11-20 20:12:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:12:36,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:12:36,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312682497] [2022-11-20 20:12:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:12:36,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:36,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:12:36,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:12:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:12:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:12:37,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:12:37,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:12:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413579656] [2022-11-20 20:12:37,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:12:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312682497] [2022-11-20 20:12:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312682497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175317907] [2022-11-20 20:12:37,300 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 20:12:37,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:12:37,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:12:37,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:12:37,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:12:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,445 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 20:12:37,445 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 [2022-11-20 20:12:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,481 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 [2022-11-20 20:12:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,506 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 [2022-11-20 20:12:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,543 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 [2022-11-20 20:12:37,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:37,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:37,737 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-20 20:12:37,737 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 [2022-11-20 20:12:37,900 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 [2022-11-20 20:12:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:37,957 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:12:37,957 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 [2022-11-20 20:12:38,046 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:12:38,046 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 [2022-11-20 20:12:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:38,129 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 20:12:38,129 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 [2022-11-20 20:12:38,237 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-20 20:12:38,238 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 [2022-11-20 20:12:38,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:38,315 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-20 20:12:38,315 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 [2022-11-20 20:12:38,416 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 20:12:38,416 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 [2022-11-20 20:12:38,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:12:39,631 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 [2022-11-20 20:12:39,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:12:39,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:12:39,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-20 20:12:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133157731] [2022-11-20 20:12:39,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:39,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 20:12:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:12:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 20:12:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:12:39,634 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) [2022-11-20 20:12:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:40,005 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-20 20:12:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:12:40,005 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 [2022-11-20 20:12:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:40,006 INFO L225 Difference]: With dead ends: 60 [2022-11-20 20:12:40,006 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 20:12:40,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:12:40,007 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 [2022-11-20 20:12:40,008 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] [2022-11-20 20:12:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 20:12:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 20:12:40,035 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) [2022-11-20 20:12:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-20 20:12:40,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-20 20:12:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:40,036 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-20 20:12:40,037 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) [2022-11-20 20:12:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-20 20:12:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 20:12:40,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:40,038 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:40,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:40,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:12:40,252 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:12:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1689346091, now seen corresponding path program 13 times [2022-11-20 20:12:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:12:40,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928224728] [2022-11-20 20:12:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:12:40,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:12:40,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738988479] [2022-11-20 20:12:40,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:12:40,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:40,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:40,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692b81fd-edc1-4fb4-9d2a-dc3086e0b305/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:12:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:40,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-20 20:12:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:40,527 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 [2022-11-20 20:12:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,562 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 [2022-11-20 20:12:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,607 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 [2022-11-20 20:12:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,679 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 [2022-11-20 20:12:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,748 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 [2022-11-20 20:12:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:40,842 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 [2022-11-20 20:12:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,051 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 [2022-11-20 20:12:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,176 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 [2022-11-20 20:12:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:41,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,323 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 [2022-11-20 20:12:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,460 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 [2022-11-20 20:12:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,597 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 [2022-11-20 20:12:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:41,881 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 [2022-11-20 20:12:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,043 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 [2022-11-20 20:12:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,215 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 [2022-11-20 20:12:42,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,382 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 [2022-11-20 20:12:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,554 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 [2022-11-20 20:12:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:12:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:42,842 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 [2022-11-20 20:12:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,021 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 [2022-11-20 20:12:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,182 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 [2022-11-20 20:12:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,352 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 [2022-11-20 20:12:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,510 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 [2022-11-20 20:12:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:12:43,694 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 [2022-11-20 20:12:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:43,780 INFO L328 TraceCheckSpWp]: Computing backward predicates...