./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/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_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/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_fdd73392-603f-4e81-9d4b-4aee81de0859/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 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e --- 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 21:01:38,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:01:38,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:01:38,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:01:38,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:01:38,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:01:38,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:01:38,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:01:38,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:01:38,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:01:38,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:01:38,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:01:38,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:01:38,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:01:38,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:01:38,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:01:38,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:01:38,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:01:38,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:01:38,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:01:38,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:01:38,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:01:38,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:01:38,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:01:38,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:01:38,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:01:38,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:01:38,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:01:38,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:01:38,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:01:38,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:01:38,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:01:38,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:01:38,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:01:38,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:01:38,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:01:38,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:01:38,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:01:38,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:01:38,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:01:38,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:01:38,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:01:38,576 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:01:38,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:01:38,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:01:38,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:01:38,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:01:38,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:01:38,578 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:01:38,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:01:38,579 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:01:38,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:01:38,580 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:01:38,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:01:38,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:01:38,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:01:38,581 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:01:38,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:01:38,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:01:38,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:01:38,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:01:38,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:01:38,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:01:38,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:01:38,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:01:38,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:01:38,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:01:38,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:01:38,585 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:01:38,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:01:38,585 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:01:38,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:01:38,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:01:38,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:01:38,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:38,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:01:38,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:01:38,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:01:38,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:01:38,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:01:38,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:01:38,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:01:38,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:01:38,588 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_fdd73392-603f-4e81-9d4b-4aee81de0859/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e [2022-11-20 21:01:38,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:01:38,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:01:38,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:01:38,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:01:38,856 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:01:38,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-11-20 21:01:41,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:01:42,060 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:01:42,060 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-11-20 21:01:42,080 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/data/3844508e7/d492c810999c4470a7c8308e720aaf5f/FLAG8e590744a [2022-11-20 21:01:42,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/data/3844508e7/d492c810999c4470a7c8308e720aaf5f [2022-11-20 21:01:42,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:01:42,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:01:42,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:42,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:01:42,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:01:42,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f24ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42, skipping insertion in model container [2022-11-20 21:01:42,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:01:42,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:01:42,399 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_fdd73392-603f-4e81-9d4b-4aee81de0859/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-11-20 21:01:42,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:42,439 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:01:42,515 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_fdd73392-603f-4e81-9d4b-4aee81de0859/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-11-20 21:01:42,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:42,538 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:01:42,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42 WrapperNode [2022-11-20 21:01:42,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:42,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:42,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:01:42,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:01:42,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,598 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 548 [2022-11-20 21:01:42,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:42,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:01:42,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:01:42,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:01:42,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:01:42,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:01:42,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:01:42,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:01:42,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (1/1) ... [2022-11-20 21:01:42,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:42,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:42,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:01:42,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:01:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:01:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:01:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:01:42,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:01:42,878 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:01:42,881 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:01:43,316 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:01:43,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:01:43,344 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 21:01:43,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:43 BoogieIcfgContainer [2022-11-20 21:01:43,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:01:43,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:01:43,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:01:43,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:01:43,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:01:42" (1/3) ... [2022-11-20 21:01:43,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec15376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:43, skipping insertion in model container [2022-11-20 21:01:43,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:42" (2/3) ... [2022-11-20 21:01:43,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec15376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:43, skipping insertion in model container [2022-11-20 21:01:43,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:43" (3/3) ... [2022-11-20 21:01:43,375 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2022-11-20 21:01:43,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:01:43,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:01:43,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:01:43,477 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;@7bb432e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:01:43,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:01:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 21:01:43,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:43,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:43,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1601611879, now seen corresponding path program 1 times [2022-11-20 21:01:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895547146] [2022-11-20 21:01:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:44,013 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 21:01:44,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895547146] [2022-11-20 21:01:44,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895547146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:44,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:44,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:01:44,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284814375] [2022-11-20 21:01:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:01:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:01:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:01:44,051 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:44,137 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2022-11-20 21:01:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:01:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 21:01:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:44,148 INFO L225 Difference]: With dead ends: 64 [2022-11-20 21:01:44,148 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 21:01:44,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:01:44,154 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 93 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:44,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:01:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 21:01:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-20 21:01:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-20 21:01:44,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2022-11-20 21:01:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:44,200 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-20 21:01:44,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-20 21:01:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 21:01:44,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:44,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:01:44,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1584601218, now seen corresponding path program 1 times [2022-11-20 21:01:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834150003] [2022-11-20 21:01:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:44,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:44,488 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 21:01:44,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834150003] [2022-11-20 21:01:44,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834150003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:44,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:44,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 21:01:44,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718434123] [2022-11-20 21:01:44,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:44,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:01:44,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:01:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:01:44,493 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:44,568 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-20 21:01:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:01:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 21:01:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:44,569 INFO L225 Difference]: With dead ends: 63 [2022-11-20 21:01:44,569 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 21:01:44,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:01:44,571 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:44,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:01:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 21:01:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-20 21:01:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-20 21:01:44,578 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2022-11-20 21:01:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:44,579 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-20 21:01:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-20 21:01:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:01:44,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:44,581 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:44,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:01:44,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 902581852, now seen corresponding path program 1 times [2022-11-20 21:01:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444031828] [2022-11-20 21:01:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:44,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444031828] [2022-11-20 21:01:44,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444031828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:44,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:44,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:01:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601626004] [2022-11-20 21:01:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:44,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:44,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:44,649 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:44,662 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-20 21:01:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-20 21:01:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:44,664 INFO L225 Difference]: With dead ends: 66 [2022-11-20 21:01:44,664 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 21:01:44,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:44,665 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:44,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:01:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 21:01:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-20 21:01:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-20 21:01:44,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-11-20 21:01:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:44,672 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-20 21:01:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-20 21:01:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:01:44,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:44,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:44,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:01:44,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 449992577, now seen corresponding path program 1 times [2022-11-20 21:01:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:44,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424701001] [2022-11-20 21:01:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:44,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:44,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424701001] [2022-11-20 21:01:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424701001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:01:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998985156] [2022-11-20 21:01:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:44,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:44,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:01:44,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:01:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:01:45,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:45,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998985156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911026924] [2022-11-20 21:01:45,722 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:01:45,722 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:01:45,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:01:45,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:01:45,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:01:51,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:02:09,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '789#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:02:09,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:02:09,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:02:09,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 21:02:09,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392334250] [2022-11-20 21:02:09,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:02:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 21:02:09,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:02:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 21:02:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 21:02:09,976 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:10,143 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-11-20 21:02:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 21:02:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-20 21:02:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:10,152 INFO L225 Difference]: With dead ends: 118 [2022-11-20 21:02:10,152 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 21:02:10,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 21:02:10,160 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:10,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 127 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:02:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 21:02:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-20 21:02:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-11-20 21:02:10,180 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49 [2022-11-20 21:02:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-11-20 21:02:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-11-20 21:02:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 21:02:10,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:10,188 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:10,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:10,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:10,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash -844379071, now seen corresponding path program 2 times [2022-11-20 21:02:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:02:10,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552223587] [2022-11-20 21:02:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:02:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:11,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:02:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552223587] [2022-11-20 21:02:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552223587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:02:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510213996] [2022-11-20 21:02:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:02:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:02:11,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:02:11,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:02:11,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 21:02:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:02:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:02:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:11,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:02:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:12,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510213996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:02:12,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469716343] [2022-11-20 21:02:12,689 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:02:12,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:02:12,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:02:12,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:02:12,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:02:15,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:02:34,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1809#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:02:34,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:02:34,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:02:34,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 21:02:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400766263] [2022-11-20 21:02:34,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:02:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 21:02:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:02:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 21:02:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 21:02:34,828 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:35,165 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-11-20 21:02:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 21:02:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-20 21:02:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:35,170 INFO L225 Difference]: With dead ends: 238 [2022-11-20 21:02:35,170 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 21:02:35,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 21:02:35,174 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:35,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 229 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:02:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 21:02:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-20 21:02:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-11-20 21:02:35,212 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109 [2022-11-20 21:02:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:35,213 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-11-20 21:02:35,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-11-20 21:02:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-20 21:02:35,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:35,222 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:35,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:02:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:35,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:02:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -588917311, now seen corresponding path program 3 times [2022-11-20 21:02:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:02:35,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232438270] [2022-11-20 21:02:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:02:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:38,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:02:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232438270] [2022-11-20 21:02:38,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232438270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:02:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534144044] [2022-11-20 21:02:38,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:02:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:02:38,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:02:38,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:02:38,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:02:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:02:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 21:02:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:39,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:02:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:42,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534144044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:02:42,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107222421] [2022-11-20 21:02:42,481 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:02:42,481 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:02:42,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:02:42,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:02:42,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:02:45,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:03:05,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3933#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:03:05,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:03:05,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:03:05,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-20 21:03:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091729912] [2022-11-20 21:03:05,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:05,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 21:03:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 21:03:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 21:03:05,047 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:05,722 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2022-11-20 21:03:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 21:03:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-11-20 21:03:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:05,725 INFO L225 Difference]: With dead ends: 478 [2022-11-20 21:03:05,725 INFO L226 Difference]: Without dead ends: 471 [2022-11-20 21:03:05,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6907 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 21:03:05,729 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 905 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:05,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 359 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:03:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-20 21:03:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-11-20 21:03:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2022-11-20 21:03:05,755 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229 [2022-11-20 21:03:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:05,755 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2022-11-20 21:03:05,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2022-11-20 21:03:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-11-20 21:03:05,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:05,762 INFO L195 NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:05,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:05,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1162450751, now seen corresponding path program 4 times [2022-11-20 21:03:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:05,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448372898] [2022-11-20 21:03:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448372898] [2022-11-20 21:03:15,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448372898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:03:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383522848] [2022-11-20 21:03:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:03:15,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:15,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:15,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:03:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 4034 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 21:03:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:16,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383522848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383308051] [2022-11-20 21:03:27,942 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:03:27,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:03:27,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:03:27,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:03:27,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:03:30,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:03:51,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8265#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:03:51,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:03:51,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:03:51,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-20 21:03:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338226366] [2022-11-20 21:03:51,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-20 21:03:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-20 21:03:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2022-11-20 21:03:51,439 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:53,605 INFO L93 Difference]: Finished difference Result 958 states and 1055 transitions. [2022-11-20 21:03:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-20 21:03:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-11-20 21:03:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:53,611 INFO L225 Difference]: With dead ends: 958 [2022-11-20 21:03:53,612 INFO L226 Difference]: Without dead ends: 951 [2022-11-20 21:03:53,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1275 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13387 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2022-11-20 21:03:53,617 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1302 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:53,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 644 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 21:03:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-20 21:03:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2022-11-20 21:03:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions. [2022-11-20 21:03:53,654 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469 [2022-11-20 21:03:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:53,655 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 952 transitions. [2022-11-20 21:03:53,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions. [2022-11-20 21:03:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2022-11-20 21:03:53,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:53,688 INFO L195 NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:53,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:53,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:53,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -37122367, now seen corresponding path program 5 times [2022-11-20 21:03:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:53,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601646609] [2022-11-20 21:03:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:53,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:28,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601646609] [2022-11-20 21:04:28,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601646609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179845981] [2022-11-20 21:04:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:28,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:28,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:04:32,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s) [2022-11-20 21:04:32,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 8066 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-20 21:04:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:33,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:18,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179845981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:18,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522456184] [2022-11-20 21:05:18,478 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:05:18,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:05:18,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:05:18,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:05:18,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:21,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:44,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17013#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:05:44,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:05:44,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:05:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-20 21:05:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486926821] [2022-11-20 21:05:44,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:44,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-20 21:05:44,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-20 21:05:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2022-11-20 21:05:44,808 INFO L87 Difference]: Start difference. First operand 951 states and 952 transitions. Second operand has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:54,705 INFO L93 Difference]: Finished difference Result 1918 states and 2111 transitions. [2022-11-20 21:05:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-20 21:05:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 949 [2022-11-20 21:05:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:54,713 INFO L225 Difference]: With dead ends: 1918 [2022-11-20 21:05:54,713 INFO L226 Difference]: Without dead ends: 1911 [2022-11-20 21:05:54,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2619 SyntacticMatches, 1 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26347 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2022-11-20 21:05:54,723 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3036 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3036 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:54,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3036 Valid, 1240 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 21:05:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-20 21:05:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911. [2022-11-20 21:05:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions. [2022-11-20 21:05:54,798 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949 [2022-11-20 21:05:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:54,800 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions. [2022-11-20 21:05:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions. [2022-11-20 21:05:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1910 [2022-11-20 21:05:54,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:54,829 INFO L195 NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:54,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 21:05:55,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:05:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -239609151, now seen corresponding path program 6 times [2022-11-20 21:05:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613448592] [2022-11-20 21:05:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:08:59,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:08:59,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613448592] [2022-11-20 21:08:59,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613448592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:08:59,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938048201] [2022-11-20 21:08:59,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:08:59,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:08:59,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:08:59,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:08:59,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:09:02,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:09:02,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:09:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 16130 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-20 21:09:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:05,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:05,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938048201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:05,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639473589] [2022-11-20 21:12:05,667 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 21:12:05,667 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:12:05,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:12:05,668 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:12:05,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:12:08,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:12:37,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34593#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:12:37,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:12:37,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:12:37,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-11-20 21:12:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004509800] [2022-11-20 21:12:37,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:12:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-20 21:12:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-20 21:12:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2022-11-20 21:12:37,787 INFO L87 Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:13:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:13:53,182 INFO L93 Difference]: Finished difference Result 3838 states and 4223 transitions. [2022-11-20 21:13:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-20 21:13:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1909 [2022-11-20 21:13:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:13:53,198 INFO L225 Difference]: With dead ends: 3838 [2022-11-20 21:13:53,199 INFO L226 Difference]: Without dead ends: 3831 [2022-11-20 21:13:53,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5307 SyntacticMatches, 1 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52267 ImplicationChecksByTransitivity, 264.2s TimeCoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2022-11-20 21:13:53,244 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4272 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4272 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:13:53,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4272 Valid, 2388 Invalid, 2381 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [800 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 21:13:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-11-20 21:13:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831. [2022-11-20 21:13:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:13:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions. [2022-11-20 21:13:53,377 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909 [2022-11-20 21:13:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:13:53,380 INFO L495 AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions. [2022-11-20 21:13:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:13:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions. [2022-11-20 21:13:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3830 [2022-11-20 21:13:53,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:13:53,459 INFO L195 NwaCegarLoop]: trace histogram [758, 757, 757, 757, 757, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:53,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:13:53,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdd73392-603f-4e81-9d4b-4aee81de0859/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:13:53,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:13:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:13:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash 280261313, now seen corresponding path program 7 times [2022-11-20 21:13:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:13:53,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914326411] [2022-11-20 21:13:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:13:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:13:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat