./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/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 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- 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 19:43:41,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:43:41,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:43:41,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:43:41,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:43:41,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:43:41,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:43:41,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:43:41,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:43:41,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:43:41,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:43:41,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:43:41,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:43:41,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:43:41,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:43:41,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:43:41,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:43:41,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:43:41,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:43:41,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:43:41,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:43:41,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:43:41,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:43:41,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:43:41,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:43:41,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:43:41,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:43:41,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:43:41,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:43:41,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:43:41,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:43:41,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:43:41,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:43:41,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:43:41,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:43:41,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:43:41,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:43:41,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:43:41,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:43:41,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:43:41,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:43:41,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:43:41,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:43:41,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:43:41,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:43:41,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:43:41,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:43:41,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:43:41,719 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:43:41,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:43:41,720 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:43:41,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:43:41,721 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:43:41,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:43:41,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:43:41,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:43:41,722 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:43:41,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:43:41,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:43:41,723 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:43:41,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:43:41,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:43:41,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:43:41,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:43:41,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:43:41,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:43:41,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:43:41,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:43:41,727 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:43:41,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:43:41,727 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:43:41,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:43:41,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:43:41,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:43:41,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:41,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:43:41,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:43:41,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:43:41,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:43:41,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:43:41,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:43:41,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:43:41,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:43:41,731 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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2022-11-20 19:43:42,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:43:42,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:43:42,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:43:42,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:43:42,074 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:43:42,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 19:43:45,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:43:45,349 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:43:45,354 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 19:43:45,369 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/data/d2c57745e/06f2a2e4b25d48729465440460cdf8fd/FLAG8ab5ce8ef [2022-11-20 19:43:45,385 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/data/d2c57745e/06f2a2e4b25d48729465440460cdf8fd [2022-11-20 19:43:45,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:43:45,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:43:45,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:45,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:43:45,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:43:45,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2748ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45, skipping insertion in model container [2022-11-20 19:43:45,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:43:45,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:43:45,646 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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-11-20 19:43:45,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:45,693 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:43:45,748 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_4f219be6-82d1-4f80-a42a-6eda65b3a38c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-11-20 19:43:45,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:45,809 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:43:45,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45 WrapperNode [2022-11-20 19:43:45,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:45,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:45,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:43:45,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:43:45,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,891 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2022-11-20 19:43:45,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:45,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:43:45,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:43:45,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:43:45,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,933 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:43:45,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:43:45,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:43:45,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:43:45,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (1/1) ... [2022-11-20 19:43:45,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:46,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:43:46,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:43:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:43:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:43:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:43:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:43:46,219 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:43:46,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:43:46,897 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:43:47,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:43:47,296 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 19:43:47,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:47 BoogieIcfgContainer [2022-11-20 19:43:47,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:43:47,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:43:47,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:43:47,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:43:47,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:43:45" (1/3) ... [2022-11-20 19:43:47,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b879e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:47, skipping insertion in model container [2022-11-20 19:43:47,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:45" (2/3) ... [2022-11-20 19:43:47,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b879e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:47, skipping insertion in model container [2022-11-20 19:43:47,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:47" (3/3) ... [2022-11-20 19:43:47,321 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 19:43:47,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:43:47,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:43:47,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:43:47,418 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;@3730f6e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:43:47,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:43:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 79 states have internal predecessors, (136), 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 19:43:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 19:43:47,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:47,430 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] [2022-11-20 19:43:47,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1024114290, now seen corresponding path program 1 times [2022-11-20 19:43:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:47,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833639417] [2022-11-20 19:43:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:47,824 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 19:43:47,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:47,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833639417] [2022-11-20 19:43:47,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833639417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:47,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:47,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778270751] [2022-11-20 19:43:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:47,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:47,863 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 79 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:48,024 INFO L93 Difference]: Finished difference Result 182 states and 299 transitions. [2022-11-20 19:43:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 19:43:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:48,040 INFO L225 Difference]: With dead ends: 182 [2022-11-20 19:43:48,040 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 19:43:48,043 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 19:43:48,049 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 91 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:48,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 294 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 19:43:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-20 19:43:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 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 19:43:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 180 transitions. [2022-11-20 19:43:48,133 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 180 transitions. Word has length 31 [2022-11-20 19:43:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:48,135 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 180 transitions. [2022-11-20 19:43:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 180 transitions. [2022-11-20 19:43:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 19:43:48,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:48,138 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] [2022-11-20 19:43:48,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:43:48,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2140555947, now seen corresponding path program 1 times [2022-11-20 19:43:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90236112] [2022-11-20 19:43:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:48,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:48,399 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 19:43:48,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90236112] [2022-11-20 19:43:48,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90236112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:48,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:48,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983589902] [2022-11-20 19:43:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:48,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:48,404 INFO L87 Difference]: Start difference. First operand 119 states and 180 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:48,496 INFO L93 Difference]: Finished difference Result 270 states and 425 transitions. [2022-11-20 19:43:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 19:43:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:48,503 INFO L225 Difference]: With dead ends: 270 [2022-11-20 19:43:48,504 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 19:43:48,508 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 19:43:48,510 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 81 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:48,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 186 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 19:43:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-11-20 19:43:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 171 states have internal predecessors, (263), 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 19:43:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 263 transitions. [2022-11-20 19:43:48,555 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 263 transitions. Word has length 33 [2022-11-20 19:43:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:48,557 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 263 transitions. [2022-11-20 19:43:48,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 263 transitions. [2022-11-20 19:43:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 19:43:48,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:48,560 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] [2022-11-20 19:43:48,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:43:48,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash 859141400, now seen corresponding path program 1 times [2022-11-20 19:43:48,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:48,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559248625] [2022-11-20 19:43:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:48,715 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 19:43:48,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:48,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559248625] [2022-11-20 19:43:48,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559248625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:48,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:48,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353857804] [2022-11-20 19:43:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:48,721 INFO L87 Difference]: Start difference. First operand 172 states and 263 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:43:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:48,805 INFO L93 Difference]: Finished difference Result 432 states and 684 transitions. [2022-11-20 19:43:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2022-11-20 19:43:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:48,807 INFO L225 Difference]: With dead ends: 432 [2022-11-20 19:43:48,808 INFO L226 Difference]: Without dead ends: 284 [2022-11-20 19:43:48,815 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 19:43:48,821 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 82 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:48,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 230 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:43:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-20 19:43:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2022-11-20 19:43:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.5693950177935942) internal successors, (441), 281 states have internal predecessors, (441), 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 19:43:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 441 transitions. [2022-11-20 19:43:48,863 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 441 transitions. Word has length 35 [2022-11-20 19:43:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:48,864 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 441 transitions. [2022-11-20 19:43:48,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:43:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 441 transitions. [2022-11-20 19:43:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 19:43:48,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:48,867 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] [2022-11-20 19:43:48,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:43:48,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1427630285, now seen corresponding path program 1 times [2022-11-20 19:43:48,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:48,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820483855] [2022-11-20 19:43:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:48,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:48,983 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 19:43:48,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:48,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820483855] [2022-11-20 19:43:48,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820483855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:48,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:48,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840632543] [2022-11-20 19:43:48,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:48,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:48,988 INFO L87 Difference]: Start difference. First operand 282 states and 441 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:49,066 INFO L93 Difference]: Finished difference Result 701 states and 1116 transitions. [2022-11-20 19:43:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 19:43:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:49,069 INFO L225 Difference]: With dead ends: 701 [2022-11-20 19:43:49,070 INFO L226 Difference]: Without dead ends: 443 [2022-11-20 19:43:49,072 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 19:43:49,080 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 81 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:49,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 202 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:43:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-20 19:43:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2022-11-20 19:43:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.5795454545454546) internal successors, (695), 440 states have internal predecessors, (695), 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 19:43:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 695 transitions. [2022-11-20 19:43:49,162 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 695 transitions. Word has length 37 [2022-11-20 19:43:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:49,162 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 695 transitions. [2022-11-20 19:43:49,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 695 transitions. [2022-11-20 19:43:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 19:43:49,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:49,165 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] [2022-11-20 19:43:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:43:49,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1953450624, now seen corresponding path program 1 times [2022-11-20 19:43:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:49,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323273909] [2022-11-20 19:43:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:49,244 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 19:43:49,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323273909] [2022-11-20 19:43:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323273909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:49,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:49,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138036097] [2022-11-20 19:43:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:49,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:49,247 INFO L87 Difference]: Start difference. First operand 441 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:49,407 INFO L93 Difference]: Finished difference Result 1141 states and 1828 transitions. [2022-11-20 19:43:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:49,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 19:43:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:49,415 INFO L225 Difference]: With dead ends: 1141 [2022-11-20 19:43:49,416 INFO L226 Difference]: Without dead ends: 737 [2022-11-20 19:43:49,417 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 19:43:49,417 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 77 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:49,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 211 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-20 19:43:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2022-11-20 19:43:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.5885558583106267) internal successors, (1166), 734 states have internal predecessors, (1166), 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 19:43:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1166 transitions. [2022-11-20 19:43:49,523 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1166 transitions. Word has length 39 [2022-11-20 19:43:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:49,525 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1166 transitions. [2022-11-20 19:43:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1166 transitions. [2022-11-20 19:43:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 19:43:49,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:49,530 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] [2022-11-20 19:43:49,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:43:49,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1510581615, now seen corresponding path program 1 times [2022-11-20 19:43:49,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076349784] [2022-11-20 19:43:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:49,613 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 19:43:49,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:49,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076349784] [2022-11-20 19:43:49,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076349784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:49,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:49,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:43:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546907496] [2022-11-20 19:43:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:43:49,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:43:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:43:49,615 INFO L87 Difference]: Start difference. First operand 735 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 19:43:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:49,819 INFO L93 Difference]: Finished difference Result 1850 states and 2960 transitions. [2022-11-20 19:43:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:43:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-20 19:43:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:49,825 INFO L225 Difference]: With dead ends: 1850 [2022-11-20 19:43:49,825 INFO L226 Difference]: Without dead ends: 1152 [2022-11-20 19:43:49,826 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 19:43:49,828 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:49,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 204 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:43:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-20 19:43:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2022-11-20 19:43:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.5900783289817233) internal successors, (1827), 1149 states have internal predecessors, (1827), 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 19:43:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1827 transitions. [2022-11-20 19:43:50,027 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1827 transitions. Word has length 41 [2022-11-20 19:43:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:50,028 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1827 transitions. [2022-11-20 19:43:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 19:43:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1827 transitions. [2022-11-20 19:43:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 19:43:50,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:50,029 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] [2022-11-20 19:43:50,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 19:43:50,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2123258818, now seen corresponding path program 1 times [2022-11-20 19:43:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:50,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712261021] [2022-11-20 19:43:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:50,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:50,157 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 19:43:50,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712261021] [2022-11-20 19:43:50,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712261021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:50,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:43:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463200236] [2022-11-20 19:43:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:43:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:43:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:50,159 INFO L87 Difference]: Start difference. First operand 1150 states and 1827 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:50,668 INFO L93 Difference]: Finished difference Result 2925 states and 4663 transitions. [2022-11-20 19:43:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:43:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 19:43:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:50,675 INFO L225 Difference]: With dead ends: 2925 [2022-11-20 19:43:50,676 INFO L226 Difference]: Without dead ends: 1825 [2022-11-20 19:43:50,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 19:43:50,678 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 459 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:50,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 782 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:43:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-20 19:43:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1815. [2022-11-20 19:43:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5804851157662625) internal successors, (2867), 1814 states have internal predecessors, (2867), 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 19:43:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2867 transitions. [2022-11-20 19:43:50,922 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2867 transitions. Word has length 43 [2022-11-20 19:43:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:50,922 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2867 transitions. [2022-11-20 19:43:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2867 transitions. [2022-11-20 19:43:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 19:43:50,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:50,924 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 19:43:50,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 19:43:50,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1459018124, now seen corresponding path program 1 times [2022-11-20 19:43:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:50,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786227142] [2022-11-20 19:43:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:51,015 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 19:43:51,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786227142] [2022-11-20 19:43:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786227142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:51,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:51,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:43:51,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790581057] [2022-11-20 19:43:51,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:51,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:43:51,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:43:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:43:51,018 INFO L87 Difference]: Start difference. First operand 1815 states and 2867 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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 19:43:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:51,331 INFO L93 Difference]: Finished difference Result 3582 states and 5673 transitions. [2022-11-20 19:43:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:43:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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 19:43:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:51,339 INFO L225 Difference]: With dead ends: 3582 [2022-11-20 19:43:51,339 INFO L226 Difference]: Without dead ends: 1817 [2022-11-20 19:43:51,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:51,342 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 152 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:51,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 281 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-20 19:43:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-20 19:43:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5738699007717751) internal successors, (2855), 1814 states have internal predecessors, (2855), 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 19:43:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2855 transitions. [2022-11-20 19:43:51,604 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2855 transitions. Word has length 44 [2022-11-20 19:43:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:51,604 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2855 transitions. [2022-11-20 19:43:51,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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 19:43:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2855 transitions. [2022-11-20 19:43:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 19:43:51,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:51,605 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, 1] [2022-11-20 19:43:51,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 19:43:51,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1957132229, now seen corresponding path program 1 times [2022-11-20 19:43:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:51,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052222472] [2022-11-20 19:43:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:51,679 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 19:43:51,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052222472] [2022-11-20 19:43:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052222472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:51,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:51,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:43:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453017702] [2022-11-20 19:43:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:43:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:43:51,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:43:51,682 INFO L87 Difference]: Start difference. First operand 1815 states and 2855 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:52,030 INFO L93 Difference]: Finished difference Result 3582 states and 5649 transitions. [2022-11-20 19:43:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:43:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-20 19:43:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:52,037 INFO L225 Difference]: With dead ends: 3582 [2022-11-20 19:43:52,037 INFO L226 Difference]: Without dead ends: 1817 [2022-11-20 19:43:52,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:52,040 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:52,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 287 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-20 19:43:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-20 19:43:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5672546857772878) internal successors, (2843), 1814 states have internal predecessors, (2843), 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 19:43:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2843 transitions. [2022-11-20 19:43:52,304 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2843 transitions. Word has length 45 [2022-11-20 19:43:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:52,304 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2843 transitions. [2022-11-20 19:43:52,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2843 transitions. [2022-11-20 19:43:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 19:43:52,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:52,306 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, 1, 1] [2022-11-20 19:43:52,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 19:43:52,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash 488168795, now seen corresponding path program 1 times [2022-11-20 19:43:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573222565] [2022-11-20 19:43:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:52,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:52,385 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 19:43:52,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:52,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573222565] [2022-11-20 19:43:52,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573222565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:52,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:52,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:43:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221418364] [2022-11-20 19:43:52,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:52,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:43:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:43:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:43:52,388 INFO L87 Difference]: Start difference. First operand 1815 states and 2843 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:52,719 INFO L93 Difference]: Finished difference Result 3582 states and 5625 transitions. [2022-11-20 19:43:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:43:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 19:43:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:52,730 INFO L225 Difference]: With dead ends: 3582 [2022-11-20 19:43:52,730 INFO L226 Difference]: Without dead ends: 1817 [2022-11-20 19:43:52,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:52,733 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 158 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:52,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 290 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-20 19:43:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-20 19:43:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5606394707828004) internal successors, (2831), 1814 states have internal predecessors, (2831), 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 19:43:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2831 transitions. [2022-11-20 19:43:52,987 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2831 transitions. Word has length 46 [2022-11-20 19:43:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:52,987 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2831 transitions. [2022-11-20 19:43:52,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2831 transitions. [2022-11-20 19:43:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 19:43:52,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:52,988 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, 1, 1, 1, 1] [2022-11-20 19:43:52,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 19:43:52,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash -538535124, now seen corresponding path program 1 times [2022-11-20 19:43:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:52,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753704421] [2022-11-20 19:43:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:53,213 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 19:43:53,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:53,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753704421] [2022-11-20 19:43:53,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753704421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:53,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:53,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:43:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830368066] [2022-11-20 19:43:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:53,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:43:53,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:43:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:53,216 INFO L87 Difference]: Start difference. First operand 1815 states and 2831 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:53,642 INFO L93 Difference]: Finished difference Result 3582 states and 5601 transitions. [2022-11-20 19:43:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:43:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 19:43:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:53,651 INFO L225 Difference]: With dead ends: 3582 [2022-11-20 19:43:53,651 INFO L226 Difference]: Without dead ends: 1817 [2022-11-20 19:43:53,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:43:53,654 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 121 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:53,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 361 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-20 19:43:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-20 19:43:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5562293274531422) internal successors, (2823), 1814 states have internal predecessors, (2823), 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 19:43:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2823 transitions. [2022-11-20 19:43:53,960 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2823 transitions. Word has length 48 [2022-11-20 19:43:53,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:53,961 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2823 transitions. [2022-11-20 19:43:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:43:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2823 transitions. [2022-11-20 19:43:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 19:43:53,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:53,962 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 19:43:53,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash 449372663, now seen corresponding path program 1 times [2022-11-20 19:43:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:53,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377482964] [2022-11-20 19:43:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:54,124 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 19:43:54,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377482964] [2022-11-20 19:43:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377482964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:54,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:54,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:43:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178889372] [2022-11-20 19:43:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:43:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:43:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:43:54,126 INFO L87 Difference]: Start difference. First operand 1815 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:43:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:54,657 INFO L93 Difference]: Finished difference Result 4559 states and 7084 transitions. [2022-11-20 19:43:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:43:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 51 [2022-11-20 19:43:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:54,667 INFO L225 Difference]: With dead ends: 4559 [2022-11-20 19:43:54,667 INFO L226 Difference]: Without dead ends: 2794 [2022-11-20 19:43:54,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:43:54,683 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 242 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:54,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 295 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-11-20 19:43:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2792. [2022-11-20 19:43:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.5442493729845934) internal successors, (4310), 2791 states have internal predecessors, (4310), 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 19:43:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4310 transitions. [2022-11-20 19:43:55,037 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4310 transitions. Word has length 51 [2022-11-20 19:43:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:55,038 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4310 transitions. [2022-11-20 19:43:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:43:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4310 transitions. [2022-11-20 19:43:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 19:43:55,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:55,039 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:55,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 19:43:55,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1056372737, now seen corresponding path program 1 times [2022-11-20 19:43:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:55,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478722031] [2022-11-20 19:43:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:55,331 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 19:43:55,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478722031] [2022-11-20 19:43:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478722031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:43:55,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:43:55,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:43:55,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764866464] [2022-11-20 19:43:55,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:43:55,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:43:55,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:43:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:43:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:43:55,333 INFO L87 Difference]: Start difference. First operand 2792 states and 4310 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 19:43:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:43:56,094 INFO L93 Difference]: Finished difference Result 3448 states and 5283 transitions. [2022-11-20 19:43:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 19:43:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) Word has length 52 [2022-11-20 19:43:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:43:56,107 INFO L225 Difference]: With dead ends: 3448 [2022-11-20 19:43:56,107 INFO L226 Difference]: Without dead ends: 3446 [2022-11-20 19:43:56,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:43:56,109 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 216 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:43:56,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 748 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:43:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-11-20 19:43:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2798. [2022-11-20 19:43:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.5409367179120486) internal successors, (4310), 2797 states have internal predecessors, (4310), 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 19:43:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4310 transitions. [2022-11-20 19:43:56,496 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4310 transitions. Word has length 52 [2022-11-20 19:43:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:43:56,496 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 4310 transitions. [2022-11-20 19:43:56,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 19:43:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4310 transitions. [2022-11-20 19:43:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 19:43:56,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:43:56,497 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:43:56,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 19:43:56,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:43:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:43:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash -994794248, now seen corresponding path program 1 times [2022-11-20 19:43:56,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:43:56,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812726792] [2022-11-20 19:43:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:56,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:43:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:43:57,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:43:57,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812726792] [2022-11-20 19:43:57,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812726792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:43:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298286580] [2022-11-20 19:43:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:43:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:43:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:57,466 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:43:57,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f219be6-82d1-4f80-a42a-6eda65b3a38c/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:43:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:43:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 19:43:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:43:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:43:59,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:03,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298286580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:03,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982187601] [2022-11-20 19:44:03,842 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2022-11-20 19:44:03,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:44:03,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:44:03,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:44:03,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:44:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:44:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:44:04,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-20 19:44:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:04,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-20 19:44:04,392 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 19:44:13,125 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 19:57:10,500 WARN L233 SmtUtils]: Spent 11.67s on a formula simplification that was a NOOP. DAG size: 502 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 19:57:27,902 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 481 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)