./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.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_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/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_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/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_003ad8f7-6d8d-432a-b801-26739ecb195e/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 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 --- 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 21:24:18,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:24:18,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:24:18,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:24:18,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:24:18,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:24:18,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:24:18,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:24:18,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:24:18,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:24:18,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:24:18,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:24:18,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:24:18,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:24:18,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:24:18,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:24:18,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:24:18,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:24:18,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:24:18,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:24:18,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:24:18,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:24:18,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:24:18,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:24:18,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:24:18,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:24:18,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:24:18,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:24:18,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:24:18,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:24:18,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:24:18,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:24:18,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:24:18,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:24:18,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:24:18,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:24:18,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:24:18,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:24:18,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:24:18,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:24:18,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:24:18,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:24:18,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:24:18,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:24:18,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:24:18,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:24:18,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:24:18,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:24:18,634 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:24:18,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:24:18,634 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:24:18,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:24:18,635 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:24:18,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:24:18,636 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:24:18,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:24:18,636 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:24:18,636 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:24:18,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:24:18,636 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:24:18,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:24:18,638 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:24:18,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:24:18,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:24:18,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:24:18,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:24:18,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:24:18,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:24:18,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:24:18,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:24:18,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:24:18,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:24:18,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:24:18,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:24:18,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:24:18,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:24:18,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:24:18,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:24:18,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:24:18,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:24:18,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:24:18,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:24:18,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:24:18,643 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_003ad8f7-6d8d-432a-b801-26739ecb195e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 [2022-11-20 21:24:18,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:24:18,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:24:18,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:24:18,988 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:24:18,989 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:24:18,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-11-20 21:24:22,020 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:24:22,206 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:24:22,207 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-11-20 21:24:22,215 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/data/d837870fd/365261e436c748e1b7ecb3d839403381/FLAGba2a7a9b7 [2022-11-20 21:24:22,232 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/data/d837870fd/365261e436c748e1b7ecb3d839403381 [2022-11-20 21:24:22,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:24:22,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:24:22,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:24:22,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:24:22,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:24:22,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1a6978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22, skipping insertion in model container [2022-11-20 21:24:22,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:24:22,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:24:22,467 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_003ad8f7-6d8d-432a-b801-26739ecb195e/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-11-20 21:24:22,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:24:22,506 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:24:22,517 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_003ad8f7-6d8d-432a-b801-26739ecb195e/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-11-20 21:24:22,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:24:22,543 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:24:22,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22 WrapperNode [2022-11-20 21:24:22,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:24:22,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:24:22,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:24:22,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:24:22,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,577 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-20 21:24:22,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:24:22,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:24:22,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:24:22,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:24:22,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:24:22,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:24:22,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:24:22,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:24:22,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (1/1) ... [2022-11-20 21:24:22,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:24:22,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:22,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:24:22,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:24:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:24:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:24:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:24:22,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:24:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 21:24:22,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 21:24:22,759 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:24:22,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:24:22,916 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:24:22,933 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:24:22,933 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:24:22,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:22 BoogieIcfgContainer [2022-11-20 21:24:22,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:24:22,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:24:22,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:24:22,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:24:22,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:24:22" (1/3) ... [2022-11-20 21:24:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a0bbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:24:22, skipping insertion in model container [2022-11-20 21:24:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:22" (2/3) ... [2022-11-20 21:24:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a0bbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:24:22, skipping insertion in model container [2022-11-20 21:24:22,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:22" (3/3) ... [2022-11-20 21:24:22,945 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2022-11-20 21:24:22,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:24:22,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:24:23,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:24:23,027 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;@335cf400, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:24:23,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:24:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 21:24:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:24:23,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:23,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:24:23,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1408153759, now seen corresponding path program 1 times [2022-11-20 21:24:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653361379] [2022-11-20 21:24:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:23,274 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 21:24:23,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653361379] [2022-11-20 21:24:23,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653361379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:23,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:23,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:24:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453179592] [2022-11-20 21:24:23,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 21:24:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 21:24:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:24:23,358 INFO L87 Difference]: Start difference. First operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:23,424 INFO L93 Difference]: Finished difference Result 45 states and 82 transitions. [2022-11-20 21:24:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 21:24:23,428 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:24:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:23,436 INFO L225 Difference]: With dead ends: 45 [2022-11-20 21:24:23,437 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 21:24:23,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:24:23,447 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:23,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:24:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 21:24:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 21:24:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 21:24:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2022-11-20 21:24:23,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 6 [2022-11-20 21:24:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:23,515 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2022-11-20 21:24:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2022-11-20 21:24:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:24:23,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:23,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:23,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:24:23,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:23,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1232571916, now seen corresponding path program 1 times [2022-11-20 21:24:23,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:23,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611907985] [2022-11-20 21:24:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:23,657 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 21:24:23,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611907985] [2022-11-20 21:24:23,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611907985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:23,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:23,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:24:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415760573] [2022-11-20 21:24:23,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:24:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:24:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:24:23,662 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:23,689 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2022-11-20 21:24:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:24:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:24:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:23,691 INFO L225 Difference]: With dead ends: 35 [2022-11-20 21:24:23,691 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 21:24:23,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:24:23,693 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:23,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:24:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 21:24:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 21:24:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 21:24:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-20 21:24:23,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 7 [2022-11-20 21:24:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:23,702 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-20 21:24:23,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-20 21:24:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:24:23,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:23,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:24:23,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1231022784, now seen corresponding path program 1 times [2022-11-20 21:24:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324801752] [2022-11-20 21:24:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:23,957 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 21:24:23,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324801752] [2022-11-20 21:24:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324801752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:23,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:23,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:24:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359534910] [2022-11-20 21:24:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:24:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:24:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:24:23,965 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:24,076 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-20 21:24:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:24:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:24:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:24,078 INFO L225 Difference]: With dead ends: 29 [2022-11-20 21:24:24,078 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 21:24:24,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:24:24,080 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:24:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 21:24:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 21:24:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 21:24:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-20 21:24:24,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-20 21:24:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:24,095 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-20 21:24:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-20 21:24:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:24:24,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:24,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:24,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:24:24,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:24,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1004679035, now seen corresponding path program 1 times [2022-11-20 21:24:24,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:24,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112480460] [2022-11-20 21:24:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:24,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:24,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:24,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820371648] [2022-11-20 21:24:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:24,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:24,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:24,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:24:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:24,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:24,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:24,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112480460] [2022-11-20 21:24:24,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820371648] [2022-11-20 21:24:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820371648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1456202611] [2022-11-20 21:24:24,643 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 21:24:24,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:24,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:24,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:24,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:24,908 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:24:24,928 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:25,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1456202611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:25,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:25,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-20 21:24:25,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442343961] [2022-11-20 21:24:25,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:25,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:24:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:24:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:25,377 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:24:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:25,442 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-20 21:24:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:24:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-20 21:24:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:25,445 INFO L225 Difference]: With dead ends: 39 [2022-11-20 21:24:25,445 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:24:25,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:25,447 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:25,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-11-20 21:24:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:24:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 21:24:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 21:24:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-20 21:24:25,463 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 12 [2022-11-20 21:24:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:25,463 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-20 21:24:25,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:24:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-20 21:24:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:24:25,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:25,465 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:25,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 21:24:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:25,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 752381984, now seen corresponding path program 1 times [2022-11-20 21:24:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729648706] [2022-11-20 21:24:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:25,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:25,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27581220] [2022-11-20 21:24:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:25,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:25,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:25,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:24:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:24:25,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:24:26,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729648706] [2022-11-20 21:24:26,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27581220] [2022-11-20 21:24:26,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27581220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190756459] [2022-11-20 21:24:26,034 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 21:24:26,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:26,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:26,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:26,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:26,292 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:24:26,306 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:26,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1190756459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:26,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:26,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-20 21:24:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354058674] [2022-11-20 21:24:26,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:26,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:24:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:24:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:26,791 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:24:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:26,845 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-11-20 21:24:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:24:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-20 21:24:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:26,847 INFO L225 Difference]: With dead ends: 44 [2022-11-20 21:24:26,847 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 21:24:26,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:26,849 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:26,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-11-20 21:24:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 21:24:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-20 21:24:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 21:24:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-20 21:24:26,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 17 [2022-11-20 21:24:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:26,864 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-20 21:24:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:24:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-20 21:24:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:24:26,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:26,865 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:26,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:27,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2088406747, now seen corresponding path program 1 times [2022-11-20 21:24:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415627789] [2022-11-20 21:24:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:27,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276379989] [2022-11-20 21:24:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:27,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:27,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:24:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:24:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:24:27,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:24:27,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415627789] [2022-11-20 21:24:27,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276379989] [2022-11-20 21:24:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276379989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:27,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874902937] [2022-11-20 21:24:27,553 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 21:24:27,554 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:27,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:27,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:27,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:27,810 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:24:27,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:28,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [874902937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:28,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:28,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-20 21:24:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004589310] [2022-11-20 21:24:28,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:24:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:24:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:28,365 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:24:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:28,416 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-11-20 21:24:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:24:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-11-20 21:24:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:28,420 INFO L225 Difference]: With dead ends: 49 [2022-11-20 21:24:28,420 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 21:24:28,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:28,423 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:28,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-11-20 21:24:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 21:24:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-20 21:24:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 21:24:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-20 21:24:28,452 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 22 [2022-11-20 21:24:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:28,452 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-20 21:24:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:24:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-20 21:24:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:24:28,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:28,454 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:28,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:28,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash 242639616, now seen corresponding path program 1 times [2022-11-20 21:24:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178692953] [2022-11-20 21:24:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:28,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:28,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552413637] [2022-11-20 21:24:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:28,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:28,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:28,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:24:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:24:28,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:24:28,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178692953] [2022-11-20 21:24:28,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552413637] [2022-11-20 21:24:28,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552413637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:28,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038567312] [2022-11-20 21:24:28,975 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-20 21:24:28,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:28,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:28,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:28,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:29,269 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:24:29,280 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2038567312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:29,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:29,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-20 21:24:29,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326214988] [2022-11-20 21:24:29,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:24:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:24:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:29,868 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:24:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:29,936 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-20 21:24:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:24:29,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2022-11-20 21:24:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:29,937 INFO L225 Difference]: With dead ends: 54 [2022-11-20 21:24:29,938 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 21:24:29,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:24:29,939 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:29,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 89 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-11-20 21:24:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 21:24:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 21:24:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 21:24:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-20 21:24:29,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2022-11-20 21:24:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:29,975 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-20 21:24:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:24:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-20 21:24:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 21:24:29,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:29,977 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:29,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:24:30,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1647453060, now seen corresponding path program 1 times [2022-11-20 21:24:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:30,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694602489] [2022-11-20 21:24:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:30,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:30,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481403970] [2022-11-20 21:24:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:30,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:30,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:30,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:24:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 21:24:30,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:30,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:30,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694602489] [2022-11-20 21:24:30,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481403970] [2022-11-20 21:24:30,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481403970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965391452] [2022-11-20 21:24:30,437 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 21:24:30,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:30,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:30,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:30,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:30,892 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:24:30,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:35,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [965391452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:35,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:24:35,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-11-20 21:24:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828737510] [2022-11-20 21:24:35,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:35,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:24:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:24:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:24:35,892 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:24:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:35,953 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-11-20 21:24:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:24:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-11-20 21:24:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:35,957 INFO L225 Difference]: With dead ends: 65 [2022-11-20 21:24:35,958 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 21:24:35,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:24:35,960 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:35,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 102 Unchecked, 0.0s Time] [2022-11-20 21:24:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 21:24:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 21:24:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-20 21:24:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-11-20 21:24:35,984 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 38 [2022-11-20 21:24:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:35,986 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-11-20 21:24:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:24:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-11-20 21:24:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:24:35,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:35,991 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:36,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:36,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:36,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash 204620983, now seen corresponding path program 1 times [2022-11-20 21:24:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:36,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819517966] [2022-11-20 21:24:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:36,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007445220] [2022-11-20 21:24:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:36,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:36,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:24:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:24:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 21:24:36,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:36,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:36,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819517966] [2022-11-20 21:24:36,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:36,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007445220] [2022-11-20 21:24:36,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007445220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:36,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066330694] [2022-11-20 21:24:36,449 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 21:24:36,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:36,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:36,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:36,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:39,859 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:24:39,864 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:42,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1947#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:42,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:42,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:42,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-20 21:24:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892530166] [2022-11-20 21:24:42,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:24:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:24:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:24:42,391 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 21:24:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:42,651 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2022-11-20 21:24:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:24:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 40 [2022-11-20 21:24:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:42,653 INFO L225 Difference]: With dead ends: 139 [2022-11-20 21:24:42,653 INFO L226 Difference]: Without dead ends: 123 [2022-11-20 21:24:42,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:24:42,655 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 71 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:42,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 242 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:24:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-20 21:24:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-11-20 21:24:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 62 states have internal predecessors, (67), 44 states have call successors, (44), 14 states have call predecessors, (44), 14 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:24:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2022-11-20 21:24:42,678 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 40 [2022-11-20 21:24:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:42,679 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2022-11-20 21:24:42,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 21:24:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2022-11-20 21:24:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:24:42,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:42,680 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:42,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:42,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:42,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash 696736299, now seen corresponding path program 1 times [2022-11-20 21:24:42,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:42,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654610165] [2022-11-20 21:24:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:42,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:42,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:42,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782379871] [2022-11-20 21:24:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:42,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:42,899 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:42,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:24:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:24:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 21:24:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 21:24:43,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654610165] [2022-11-20 21:24:43,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782379871] [2022-11-20 21:24:43,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782379871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826627275] [2022-11-20 21:24:43,324 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 21:24:43,324 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:43,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:43,324 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:43,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:46,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:24:46,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:55,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2604#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:55,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:55,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:55,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-20 21:24:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775171021] [2022-11-20 21:24:55,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 21:24:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 21:24:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:24:55,274 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 21:24:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:56,015 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-11-20 21:24:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:24:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2022-11-20 21:24:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:56,019 INFO L225 Difference]: With dead ends: 135 [2022-11-20 21:24:56,019 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 21:24:56,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:24:56,020 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:56,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:24:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 21:24:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-20 21:24:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 74 states have internal predecessors, (79), 44 states have call successors, (44), 18 states have call predecessors, (44), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:24:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2022-11-20 21:24:56,053 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 40 [2022-11-20 21:24:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:56,054 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2022-11-20 21:24:56,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-20 21:24:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2022-11-20 21:24:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 21:24:56,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:56,055 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:56,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 21:24:56,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:56,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1539244486, now seen corresponding path program 2 times [2022-11-20 21:24:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:56,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589752882] [2022-11-20 21:24:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:56,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:56,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046624645] [2022-11-20 21:24:56,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:24:56,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:56,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:24:56,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:24:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:24:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:24:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 21:24:56,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-20 21:24:56,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589752882] [2022-11-20 21:24:56,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046624645] [2022-11-20 21:24:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046624645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887415214] [2022-11-20 21:24:56,528 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 21:24:56,528 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:56,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:56,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:56,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:59,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-20 21:24:59,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:00,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3300#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:00,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:00,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:00,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 21:25:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921048096] [2022-11-20 21:25:00,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:25:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:25:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:25:00,707 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 21:25:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:00,968 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2022-11-20 21:25:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:25:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-11-20 21:25:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:00,971 INFO L225 Difference]: With dead ends: 139 [2022-11-20 21:25:00,971 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 21:25:00,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:25:00,972 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:00,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 208 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 21:25:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-20 21:25:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 77 states have internal predecessors, (82), 44 states have call successors, (44), 19 states have call predecessors, (44), 19 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:25:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2022-11-20 21:25:01,002 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 45 [2022-11-20 21:25:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:01,003 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2022-11-20 21:25:01,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 21:25:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2022-11-20 21:25:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 21:25:01,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:01,004 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:01,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:25:01,209 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -743936932, now seen corresponding path program 1 times [2022-11-20 21:25:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:01,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890511617] [2022-11-20 21:25:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:01,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:01,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172632981] [2022-11-20 21:25:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:01,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:01,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:01,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:25:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:01,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:25:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 21:25:01,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:29,990 WARN L859 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_144| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246|))) (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 0) (not (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 12) (* (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|) 6)) .cse0)) (= 0 (mod (+ (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|) (div (- .cse0) (- 6))) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|)) (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 18) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| 10) (* 3 .cse0) 10) (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251|)) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246| 3)))))))) is different from true [2022-11-20 21:26:13,709 WARN L233 SmtUtils]: Spent 13.55s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:26:27,765 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_144| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246|))) (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 0) (not (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 12) (* (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|) 6)) .cse0)) (= 0 (mod (+ (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|) (div (- .cse0) (- 6))) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|)) (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| 18) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| 10) (* 3 .cse0) 10) (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_251|)) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_246| 3))))))) is different from true [2022-11-20 21:26:44,362 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:26:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 35 proven. 21 refuted. 3 times theorem prover too weak. 66 trivial. 3 not checked. [2022-11-20 21:26:58,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:26:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890511617] [2022-11-20 21:26:58,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:26:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172632981] [2022-11-20 21:26:58,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172632981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:58,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628346546] [2022-11-20 21:26:58,527 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-20 21:26:58,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:58,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:58,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:58,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:59,074 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-20 21:26:59,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:27:40,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [628346546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:27:40,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:27:40,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 11] total 22 [2022-11-20 21:27:40,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587347535] [2022-11-20 21:27:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:27:40,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:27:40,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:27:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=8, NotChecked=74, Total=462 [2022-11-20 21:27:40,854 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:27:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:40,917 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2022-11-20 21:27:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:27:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-11-20 21:27:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:40,920 INFO L225 Difference]: With dead ends: 147 [2022-11-20 21:27:40,920 INFO L226 Difference]: Without dead ends: 143 [2022-11-20 21:27:40,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 98 SyntacticMatches, 24 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=8, NotChecked=74, Total=462 [2022-11-20 21:27:40,921 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:40,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 95 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 94 Unchecked, 0.0s Time] [2022-11-20 21:27:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-20 21:27:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-20 21:27:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 81 states have internal predecessors, (86), 44 states have call successors, (44), 21 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:27:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2022-11-20 21:27:40,950 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 48 [2022-11-20 21:27:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:40,951 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2022-11-20 21:27:40,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:27:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2022-11-20 21:27:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 21:27:40,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:40,953 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:40,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:41,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:27:41,159 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash -375151797, now seen corresponding path program 3 times [2022-11-20 21:27:41,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:41,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45813121] [2022-11-20 21:27:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:41,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:41,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038357700] [2022-11-20 21:27:41,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:27:41,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:41,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:41,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:41,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:27:41,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:27:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:27:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:27:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 21:27:41,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:41,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45813121] [2022-11-20 21:27:41,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:27:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038357700] [2022-11-20 21:27:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038357700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:27:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917538420] [2022-11-20 21:27:41,638 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 21:27:41,638 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:27:41,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:27:41,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:27:41,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:27:44,717 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:27:44,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:27:48,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4733#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:27:48,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:27:48,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:27:48,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-20 21:27:48,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294838909] [2022-11-20 21:27:48,923 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 21:27:48,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:27:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:27:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:27:48,924 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:27:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:49,365 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2022-11-20 21:27:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:27:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-11-20 21:27:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:49,367 INFO L225 Difference]: With dead ends: 153 [2022-11-20 21:27:49,367 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 21:27:49,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:27:49,369 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:49,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:27:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 21:27:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-20 21:27:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-20 21:27:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-11-20 21:27:49,392 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 50 [2022-11-20 21:27:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:49,392 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-11-20 21:27:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:27:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-11-20 21:27:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:27:49,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:49,394 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:49,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-20 21:27:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:49,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 780075682, now seen corresponding path program 1 times [2022-11-20 21:27:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505200059] [2022-11-20 21:27:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:49,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:49,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104323098] [2022-11-20 21:27:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:49,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:49,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:49,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:27:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 21:27:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 21:27:50,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 21:27:50,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:50,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505200059] [2022-11-20 21:27:50,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:27:50,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104323098] [2022-11-20 21:27:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104323098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:27:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708301361] [2022-11-20 21:27:50,620 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 21:27:50,620 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:27:50,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:27:50,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:27:50,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:27:54,253 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:27:54,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:27:55,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5555#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:27:55,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:27:55,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:27:55,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-20 21:27:55,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117104812] [2022-11-20 21:27:55,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:27:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:27:55,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:27:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:27:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:27:55,416 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-20 21:27:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:56,672 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2022-11-20 21:27:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:27:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 66 [2022-11-20 21:27:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:56,680 INFO L225 Difference]: With dead ends: 136 [2022-11-20 21:27:56,680 INFO L226 Difference]: Without dead ends: 132 [2022-11-20 21:27:56,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:27:56,682 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:56,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:27:56,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-20 21:27:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-20 21:27:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.08) internal successors, (81), 78 states have internal predecessors, (81), 37 states have call successors, (37), 20 states have call predecessors, (37), 19 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-20 21:27:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2022-11-20 21:27:56,714 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 66 [2022-11-20 21:27:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:56,715 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2022-11-20 21:27:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-20 21:27:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2022-11-20 21:27:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 21:27:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:56,716 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:56,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:27:56,919 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:27:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1686864157, now seen corresponding path program 1 times [2022-11-20 21:27:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:27:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483227645] [2022-11-20 21:27:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:27:56,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:27:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821099536] [2022-11-20 21:27:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:56,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:56,928 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:56,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:27:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:57,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:27:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-20 21:27:57,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-20 21:27:57,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:27:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483227645] [2022-11-20 21:27:57,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:27:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821099536] [2022-11-20 21:27:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821099536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:27:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753864117] [2022-11-20 21:27:57,946 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 21:27:57,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:27:57,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:27:57,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:27:57,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:28:01,557 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:28:01,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:28:02,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6408#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:28:02,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:28:02,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:28:02,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-20 21:28:02,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599103553] [2022-11-20 21:28:02,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:28:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:28:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:28:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:28:02,939 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-20 21:28:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:04,684 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2022-11-20 21:28:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:28:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 71 [2022-11-20 21:28:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:04,687 INFO L225 Difference]: With dead ends: 155 [2022-11-20 21:28:04,687 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 21:28:04,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 21:28:04,688 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:04,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 21:28:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 21:28:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-11-20 21:28:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 77 states have (on average 1.077922077922078) internal successors, (83), 81 states have internal predecessors, (83), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:28:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-11-20 21:28:04,722 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 71 [2022-11-20 21:28:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:04,722 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-11-20 21:28:04,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-20 21:28:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-11-20 21:28:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 21:28:04,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:04,724 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-20 21:28:04,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:04,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:28:04,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:28:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -226115244, now seen corresponding path program 4 times [2022-11-20 21:28:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:28:04,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262962966] [2022-11-20 21:28:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:28:04,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:28:04,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656849432] [2022-11-20 21:28:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:28:04,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:04,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:04,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:28:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:28:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 21:28:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-20 21:28:05,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-20 21:28:05,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:28:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262962966] [2022-11-20 21:28:05,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:28:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656849432] [2022-11-20 21:28:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656849432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:28:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602072938] [2022-11-20 21:28:05,700 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 21:28:05,700 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:28:05,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:28:05,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:28:05,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:28:09,096 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:28:09,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:28:10,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7323#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:28:10,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:28:10,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:28:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-20 21:28:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283052289] [2022-11-20 21:28:10,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:10,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:28:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:28:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:28:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:28:10,020 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-20 21:28:12,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:28:15,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:28:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:16,268 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2022-11-20 21:28:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:28:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 73 [2022-11-20 21:28:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:16,270 INFO L225 Difference]: With dead ends: 169 [2022-11-20 21:28:16,271 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 21:28:16,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:28:16,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 177 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:16,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 118 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 721 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-20 21:28:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 21:28:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2022-11-20 21:28:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 83 states have (on average 1.072289156626506) internal successors, (89), 87 states have internal predecessors, (89), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 21:28:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2022-11-20 21:28:16,320 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 73 [2022-11-20 21:28:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:16,321 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2022-11-20 21:28:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-20 21:28:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2022-11-20 21:28:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 21:28:16,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:16,322 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2022-11-20 21:28:16,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:16,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:28:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -750862223, now seen corresponding path program 5 times [2022-11-20 21:28:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:28:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661392902] [2022-11-20 21:28:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:28:16,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:28:16,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613148914] [2022-11-20 21:28:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:28:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:16,539 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:16,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:28:16,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:28:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 21:28:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-20 21:28:16,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-20 21:28:17,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:28:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661392902] [2022-11-20 21:28:17,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:28:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613148914] [2022-11-20 21:28:17,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613148914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:28:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096787818] [2022-11-20 21:28:17,927 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 21:28:17,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:28:17,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:28:17,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:28:17,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:28:20,739 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:28:20,743 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:28:23,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8305#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:28:23,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:28:23,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:28:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-20 21:28:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350284564] [2022-11-20 21:28:23,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:28:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:28:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:28:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:28:23,866 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 21:28:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:27,186 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2022-11-20 21:28:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:28:27,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2022-11-20 21:28:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:27,189 INFO L225 Difference]: With dead ends: 154 [2022-11-20 21:28:27,189 INFO L226 Difference]: Without dead ends: 136 [2022-11-20 21:28:27,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:28:27,190 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:27,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 75 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 21:28:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-20 21:28:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-11-20 21:28:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 80 states have (on average 1.05) internal successors, (84), 83 states have internal predecessors, (84), 34 states have call successors, (34), 21 states have call predecessors, (34), 21 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-20 21:28:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2022-11-20 21:28:27,236 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 78 [2022-11-20 21:28:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:27,237 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2022-11-20 21:28:27,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 21:28:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2022-11-20 21:28:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 21:28:27,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:27,239 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:28:27,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:27,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:28:27,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:28:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2067588009, now seen corresponding path program 2 times [2022-11-20 21:28:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:28:27,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121288619] [2022-11-20 21:28:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:28:27,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:28:27,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877528181] [2022-11-20 21:28:27,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:28:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:27,458 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:27,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:28:27,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 21:28:27,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:28:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-20 21:28:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-11-20 21:28:27,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:28:27,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121288619] [2022-11-20 21:28:27,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:28:27,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877528181] [2022-11-20 21:28:27,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877528181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:28:27,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221701232] [2022-11-20 21:28:27,923 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 21:28:27,923 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:28:27,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:28:27,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:28:27,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:28:31,091 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:28:31,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:28:31,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9497#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:28:31,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:28:31,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:28:31,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-20 21:28:31,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924984561] [2022-11-20 21:28:31,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:28:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:28:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:28:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:28:31,906 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-20 21:28:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:32,547 INFO L93 Difference]: Finished difference Result 369 states and 400 transitions. [2022-11-20 21:28:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:28:32,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 124 [2022-11-20 21:28:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:32,550 INFO L225 Difference]: With dead ends: 369 [2022-11-20 21:28:32,550 INFO L226 Difference]: Without dead ends: 353 [2022-11-20 21:28:32,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:28:32,552 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 160 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:32,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 272 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:28:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-20 21:28:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 297. [2022-11-20 21:28:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 180 states have (on average 1.0555555555555556) internal successors, (190), 187 states have internal predecessors, (190), 68 states have call successors, (68), 49 states have call predecessors, (68), 48 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-20 21:28:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 323 transitions. [2022-11-20 21:28:32,645 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 323 transitions. Word has length 124 [2022-11-20 21:28:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:32,645 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 323 transitions. [2022-11-20 21:28:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-20 21:28:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 323 transitions. [2022-11-20 21:28:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 21:28:32,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:32,647 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:28:32,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 21:28:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:28:32,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:28:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -35260082, now seen corresponding path program 1 times [2022-11-20 21:28:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:28:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211581078] [2022-11-20 21:28:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:28:32,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:28:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889926577] [2022-11-20 21:28:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:28:32,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:32,866 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:28:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:28:32,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 21:28:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 21:28:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 21:28:47,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:28:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211581078] [2022-11-20 21:28:47,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:28:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889926577] [2022-11-20 21:28:47,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889926577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:28:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703222992] [2022-11-20 21:28:47,507 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-20 21:28:47,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:28:47,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:28:47,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:28:47,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:28:50,290 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:28:50,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:29:11,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11282#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:29:11,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:29:11,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:29:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-20 21:29:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930487394] [2022-11-20 21:29:11,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:29:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:29:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:29:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:29:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=871, Unknown=3, NotChecked=0, Total=1056 [2022-11-20 21:29:11,012 INFO L87 Difference]: Start difference. First operand 297 states and 323 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2022-11-20 21:29:39,880 WARN L233 SmtUtils]: Spent 26.84s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:29:42,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:29:44,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:29:47,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:00,364 WARN L233 SmtUtils]: Spent 11.12s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:30:02,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:10,296 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:30:12,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:14,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:17,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:20,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:21,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:24,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:26,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:28,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:30,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:32,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:34,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:36,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:42,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:44,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:45,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:48,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:50,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:58,584 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:30:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:30:59,708 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2022-11-20 21:30:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:30:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) Word has length 132 [2022-11-20 21:30:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:30:59,711 INFO L225 Difference]: With dead ends: 312 [2022-11-20 21:30:59,711 INFO L226 Difference]: Without dead ends: 291 [2022-11-20 21:30:59,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=291, Invalid=1266, Unknown=3, NotChecked=0, Total=1560 [2022-11-20 21:30:59,712 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 139 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 52.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:30:59,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 142 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 806 Invalid, 16 Unknown, 31 Unchecked, 52.7s Time] [2022-11-20 21:30:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-20 21:30:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2022-11-20 21:30:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 175 states have (on average 1.0514285714285714) internal successors, (184), 182 states have internal predecessors, (184), 66 states have call successors, (66), 47 states have call predecessors, (66), 47 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-20 21:30:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 313 transitions. [2022-11-20 21:30:59,849 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 313 transitions. Word has length 132 [2022-11-20 21:30:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:30:59,850 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 313 transitions. [2022-11-20 21:30:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2022-11-20 21:30:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 313 transitions. [2022-11-20 21:30:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-20 21:30:59,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:30:59,852 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:30:59,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 21:31:00,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:00,058 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:31:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1345487281, now seen corresponding path program 2 times [2022-11-20 21:31:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406382848] [2022-11-20 21:31:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:00,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887177346] [2022-11-20 21:31:00,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:31:00,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:00,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:00,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:31:02,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:31:02,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:31:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 21:31:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:31:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 326 proven. 61 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-11-20 21:31:15,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:31:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 200 proven. 39 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-11-20 21:31:20,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406382848] [2022-11-20 21:31:20,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:31:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887177346] [2022-11-20 21:31:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887177346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:31:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848503281] [2022-11-20 21:31:20,348 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 21:31:20,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:31:20,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:31:20,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:31:20,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:31:24,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-20 21:31:24,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:31:26,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13112#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:31:26,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:31:26,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:31:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-20 21:31:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655980890] [2022-11-20 21:31:26,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:31:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:31:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:26,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:31:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:31:26,448 INFO L87 Difference]: Start difference. First operand 289 states and 313 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2022-11-20 21:31:32,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:37,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:41,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:43,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:44,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:47,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:49,660 INFO L93 Difference]: Finished difference Result 301 states and 325 transitions. [2022-11-20 21:31:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:31:49,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 155 [2022-11-20 21:31:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:49,662 INFO L225 Difference]: With dead ends: 301 [2022-11-20 21:31:49,663 INFO L226 Difference]: Without dead ends: 291 [2022-11-20 21:31:49,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 433 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=196, Invalid=1133, Unknown=3, NotChecked=0, Total=1332 [2022-11-20 21:31:49,664 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:49,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 85 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 239 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2022-11-20 21:31:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-20 21:31:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-11-20 21:31:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 182 states have internal predecessors, (184), 61 states have call successors, (61), 49 states have call predecessors, (61), 48 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-20 21:31:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 304 transitions. [2022-11-20 21:31:49,808 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 304 transitions. Word has length 155 [2022-11-20 21:31:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:49,809 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 304 transitions. [2022-11-20 21:31:49,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2022-11-20 21:31:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 304 transitions. [2022-11-20 21:31:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-20 21:31:49,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:49,811 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:31:49,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:31:50,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:50,019 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:31:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash 84841868, now seen corresponding path program 2 times [2022-11-20 21:31:50,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:50,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217894129] [2022-11-20 21:31:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:50,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:50,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:31:50,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186502477] [2022-11-20 21:31:50,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:31:50,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:31:50,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:31:50,034 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:31:50,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:31:58,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:31:58,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:31:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 21:31:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:32:47,502 WARN L233 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 75 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:32:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 1178 proven. 144 refuted. 0 times theorem prover too weak. 3574 trivial. 0 not checked. [2022-11-20 21:32:52,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:33:00,859 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~z~0#1|))) (or (not (= (* |c_ULTIMATE.start_main_~y~0#1| 2) (+ 2 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~z~0#1|)))) (not (= (+ .cse0 12) (+ (* |c_ULTIMATE.start_main_~y~0#1| 12) (* 6 |c_ULTIMATE.start_main_~z~0#1|)))) (not (= |c_ULTIMATE.start_main_~z~0#1| (+ 6 (* |c_ULTIMATE.start_main_~n~0#1| 6)))) (= (+ (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 2) 8 (* .cse0 2) .cse1) (+ (* |c_ULTIMATE.start_main_~x~0#1| 36) (* .cse2 3) (* 7 |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 46))) (not (= (+ .cse2 .cse1) (+ (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~a~0#1|) 6) (* |c_ULTIMATE.start_main_~y~0#1| 6) (* 6 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| 6)))))) is different from true [2022-11-20 21:33:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 767 proven. 51 refuted. 0 times theorem prover too weak. 4077 trivial. 1 not checked. [2022-11-20 21:33:01,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:33:01,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217894129] [2022-11-20 21:33:01,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:33:01,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186502477] [2022-11-20 21:33:01,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186502477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:33:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157214001] [2022-11-20 21:33:01,556 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-20 21:33:01,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:33:01,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:33:01,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:33:01,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:33:04,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-20 21:33:04,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:33:41,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15627#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:33:41,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:33:41,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:33:41,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-20 21:33:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174227823] [2022-11-20 21:33:41,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:33:41,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:33:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:33:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:33:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=980, Unknown=9, NotChecked=66, Total=1260 [2022-11-20 21:33:41,047 INFO L87 Difference]: Start difference. First operand 290 states and 304 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 14 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2022-11-20 21:33:58,402 WARN L233 SmtUtils]: Spent 15.23s on a formula simplification. DAG size of input: 72 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:34:02,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:04,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:07,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:09,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:11,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:13,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:15,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:21,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:24,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:26,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:31,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:33,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:35,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:37,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:44,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:34:46,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:35:13,460 WARN L233 SmtUtils]: Spent 23.59s on a formula simplification. DAG size of input: 88 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:35:16,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:35:17,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:35:20,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:35:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:35:20,118 INFO L93 Difference]: Finished difference Result 296 states and 309 transitions. [2022-11-20 21:35:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:35:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 14 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) Word has length 272 [2022-11-20 21:35:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:35:20,121 INFO L225 Difference]: With dead ends: 296 [2022-11-20 21:35:20,121 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 21:35:20,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 778 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 120.0s TimeCoverageRelationStatistics Valid=279, Invalid=1352, Unknown=13, NotChecked=78, Total=1722 [2022-11-20 21:35:20,123 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 83 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 42.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:35:20,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 70 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 303 Invalid, 17 Unknown, 44 Unchecked, 42.8s Time] [2022-11-20 21:35:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 21:35:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-11-20 21:35:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 52 states have call successors, (52), 44 states have call predecessors, (52), 43 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-20 21:35:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 269 transitions. [2022-11-20 21:35:20,267 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 269 transitions. Word has length 272 [2022-11-20 21:35:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:35:20,268 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 269 transitions. [2022-11-20 21:35:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 14 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2022-11-20 21:35:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 269 transitions. [2022-11-20 21:35:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-20 21:35:20,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:35:20,271 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:35:20,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:35:20,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:35:20,481 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:35:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:35:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1818744179, now seen corresponding path program 3 times [2022-11-20 21:35:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:35:20,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366178824] [2022-11-20 21:35:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:35:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:35:20,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:35:20,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175719418] [2022-11-20 21:35:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:35:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:35:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:35:20,503 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:35:20,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:35:20,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:35:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-20 21:35:20,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 21:35:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:35:20,960 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 21:35:20,961 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 21:35:20,962 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:35:20,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:35:21,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 21:35:21,174 INFO L444 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:35:21,178 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:35:21,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:35:21 BoogieIcfgContainer [2022-11-20 21:35:21,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:35:21,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:35:21,284 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:35:21,284 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:35:21,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:22" (3/4) ... [2022-11-20 21:35:21,287 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 21:35:21,416 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 21:35:21,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:35:21,417 INFO L158 Benchmark]: Toolchain (without parser) took 659180.37ms. Allocated memory was 159.4MB in the beginning and 406.8MB in the end (delta: 247.5MB). Free memory was 122.1MB in the beginning and 147.0MB in the end (delta: -24.9MB). Peak memory consumption was 223.4MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,418 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 82.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:35:21,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.04ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 129.1MB in the end (delta: -7.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,419 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.73ms. Allocated memory is still 159.4MB. Free memory was 129.1MB in the beginning and 127.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:35:21,419 INFO L158 Benchmark]: Boogie Preprocessor took 23.27ms. Allocated memory is still 159.4MB. Free memory was 127.8MB in the beginning and 126.4MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,421 INFO L158 Benchmark]: RCFGBuilder took 334.21ms. Allocated memory is still 159.4MB. Free memory was 126.4MB in the beginning and 113.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,422 INFO L158 Benchmark]: TraceAbstraction took 658345.24ms. Allocated memory was 159.4MB in the beginning and 406.8MB in the end (delta: 247.5MB). Free memory was 113.2MB in the beginning and 156.5MB in the end (delta: -43.3MB). Peak memory consumption was 206.2MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,422 INFO L158 Benchmark]: Witness Printer took 132.88ms. Allocated memory is still 406.8MB. Free memory was 156.5MB in the beginning and 147.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:35:21,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 82.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.04ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 129.1MB in the end (delta: -7.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.73ms. Allocated memory is still 159.4MB. Free memory was 129.1MB in the beginning and 127.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.27ms. Allocated memory is still 159.4MB. Free memory was 127.8MB in the beginning and 126.4MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 334.21ms. Allocated memory is still 159.4MB. Free memory was 126.4MB in the beginning and 113.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 658345.24ms. Allocated memory was 159.4MB in the beginning and 406.8MB in the end (delta: 247.5MB). Free memory was 113.2MB in the beginning and 156.5MB in the end (delta: -43.3MB). Peak memory consumption was 206.2MB. Max. memory is 16.1GB. * Witness Printer took 132.88ms. Allocated memory is still 406.8MB. Free memory was 156.5MB in the beginning and 147.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [a=10, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [a=10, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [a=10, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [a=10, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [a=10, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [a=10, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [a=10, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=6, n=6, x=216, y=127, z=42] [L33] EXPR counter++ VAL [a=10, counter=7, counter++=6, n=6, x=216, y=127, z=42] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=7, n=7, x=343, y=169, z=48] [L33] EXPR counter++ VAL [a=10, counter=8, counter++=7, n=7, x=343, y=169, z=48] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=8, n=8, x=512, y=217, z=54] [L33] EXPR counter++ VAL [a=10, counter=9, counter++=8, n=8, x=512, y=217, z=54] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=9, n=9, x=729, y=271, z=60] [L33] EXPR counter++ VAL [a=10, counter=10, counter++=9, n=9, x=729, y=271, z=60] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=10, n=10, x=1000, y=331, z=66] [L33] EXPR counter++ VAL [a=10, counter=11, counter++=10, n=10, x=1000, y=331, z=66] [L33] COND FALSE !(counter++<10) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, counter=11] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [a=10, counter=11, n=10, x=1000, y=331, z=66] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 658.2s, OverallIterations: 22, TraceHistogramMax: 52, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 246.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 mSolverCounterUnknown, 643 SdHoareTripleChecker+Valid, 122.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 576 mSDsluCounter, 2188 SdHoareTripleChecker+Invalid, 121.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 481 IncrementalHoareTripleChecker+Unchecked, 1484 mSDsCounter, 986 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4400 IncrementalHoareTripleChecker+Invalid, 5904 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 986 mSolverCounterUnsat, 704 mSDtfsCounter, 4400 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 3373 SyntacticMatches, 85 SemanticMatches, 475 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 339.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=18, InterpolantAutomatonStates: 207, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 88 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 11.2s SatisfiabilityAnalysisTime, 220.2s InterpolantComputationTime, 1622 NumberOfCodeBlocks, 1258 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 2515 ConstructedInterpolants, 6 QuantifiedInterpolants, 18979 SizeOfPredicates, 72 NumberOfNonLiveVariables, 2587 ConjunctsInSsa, 484 ConjunctsInUnsatCore, 37 InterpolantComputations, 3 PerfectInterpolantSequences, 18725/20464 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 12, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 98, DAG_INTERPRETER_EARLY_EXITS: 6, TOOLS_POST_APPLICATIONS: 62, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 78, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 48, TOOLS_POST_RETURN_TIME: 0.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 188, TOOLS_QUANTIFIERELIM_TIME: 1.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 238, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 104, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 98, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 48, CALL_SUMMARIZER_CACHE_MISSES: 6, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 852, DAG_COMPRESSION_RETAINED_NODES: 262, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 21:35:21,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_003ad8f7-6d8d-432a-b801-26739ecb195e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE