./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash b48bd99976d95d3d7781e3907aa9eed49a14d14a98b72da29a590c48eef8f00e --- 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-5e519f3 [2022-11-03 01:43:31,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:31,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:31,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:31,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:31,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:31,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:31,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:31,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:31,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:31,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:31,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:31,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:31,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:31,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:31,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:31,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:31,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:31,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:31,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:31,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:31,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:31,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:31,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:31,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:31,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:31,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:31,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:31,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:31,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:31,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:31,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:31,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:31,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:31,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:31,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:31,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:31,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:31,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:31,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:31,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:31,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:43:31,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:31,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:31,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:31,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:31,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:31,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:31,878 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:31,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:31,879 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:31,879 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:43:31,879 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:31,880 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:31,880 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:43:31,880 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:43:31,880 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:31,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:43:31,881 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:43:31,881 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:43:31,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:31,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:43:31,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:31,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:43:31,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:31,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:43:31,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:43:31,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:31,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:43:31,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:31,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:31,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:31,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:31,884 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:43:31,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:31,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:43:31,887 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:43:31,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:43:31,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:43:31,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:31,888 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_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b48bd99976d95d3d7781e3907aa9eed49a14d14a98b72da29a590c48eef8f00e [2022-11-03 01:43:32,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:32,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:32,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:32,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:32,305 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:32,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:43:32,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/980ae4858/e28b8b08ef3e40b2ad22fd4246a3ad45/FLAG03d5963ba [2022-11-03 01:43:33,089 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:33,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:43:33,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/980ae4858/e28b8b08ef3e40b2ad22fd4246a3ad45/FLAG03d5963ba [2022-11-03 01:43:33,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/980ae4858/e28b8b08ef3e40b2ad22fd4246a3ad45 [2022-11-03 01:43:33,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:33,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:33,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:33,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:33,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:33,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:33" (1/1) ... [2022-11-03 01:43:33,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1b5221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:33, skipping insertion in model container [2022-11-03 01:43:33,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:33" (1/1) ... [2022-11-03 01:43:33,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:33,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:33,681 WARN L230 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_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c[1014,1027] [2022-11-03 01:43:34,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:34,196 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:34,209 WARN L230 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_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c[1014,1027] [2022-11-03 01:43:34,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:34,419 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:34,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34 WrapperNode [2022-11-03 01:43:34,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:34,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:34,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:34,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:34,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:34,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:34,849 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1836 [2022-11-03 01:43:34,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:34,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:34,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:34,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:34,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:34,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:34,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:34,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:35,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:35,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:35,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:35,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (1/1) ... [2022-11-03 01:43:35,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:35,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:35,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:35,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:35,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:51:18,770 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:51:26,571 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:51:26,572 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:51:26,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:26 BoogieIcfgContainer [2022-11-03 01:51:26,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:51:26,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:51:26,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:51:26,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:51:26,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:33" (1/3) ... [2022-11-03 01:51:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:26, skipping insertion in model container [2022-11-03 01:51:26,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:34" (2/3) ... [2022-11-03 01:51:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:26, skipping insertion in model container [2022-11-03 01:51:26,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:26" (3/3) ... [2022-11-03 01:51:26,588 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:51:26,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:51:26,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:51:26,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:51:26,683 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;@382dcef2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:51:26,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:51:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:51:26,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:26,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:51:26,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 9022958, now seen corresponding path program 1 times [2022-11-03 01:51:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:26,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687709502] [2022-11-03 01:51:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:51:27,402 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:51:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:51:27,951 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:51:27,953 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:51:27,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:51:27,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:51:27,962 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:51:27,967 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:51:28,012 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:51:28,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:51:28 BoogieIcfgContainer [2022-11-03 01:51:28,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:51:28,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:51:28,040 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:51:28,040 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:51:28,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:26" (3/4) ... [2022-11-03 01:51:28,046 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:51:28,046 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:51:28,048 INFO L158 Benchmark]: Toolchain (without parser) took 474720.31ms. Allocated memory was 111.1MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 64.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 193.2MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,048 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:51:28,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1088.56ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 64.3MB in the beginning and 91.4MB in the end (delta: -27.1MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 428.43ms. Allocated memory is still 136.3MB. Free memory was 91.4MB in the beginning and 67.4MB in the end (delta: 24.1MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,056 INFO L158 Benchmark]: Boogie Preprocessor took 442.14ms. Allocated memory was 136.3MB in the beginning and 249.6MB in the end (delta: 113.2MB). Free memory was 67.4MB in the beginning and 177.9MB in the end (delta: -110.5MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,057 INFO L158 Benchmark]: RCFGBuilder took 471280.48ms. Allocated memory was 249.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 177.9MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 591.3MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,059 INFO L158 Benchmark]: TraceAbstraction took 1460.58ms. Allocated memory is still 1.3GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 87.0MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,060 INFO L158 Benchmark]: Witness Printer took 6.51ms. Allocated memory is still 1.3GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:28,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1088.56ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 64.3MB in the beginning and 91.4MB in the end (delta: -27.1MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 428.43ms. Allocated memory is still 136.3MB. Free memory was 91.4MB in the beginning and 67.4MB in the end (delta: 24.1MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 442.14ms. Allocated memory was 136.3MB in the beginning and 249.6MB in the end (delta: 113.2MB). Free memory was 67.4MB in the beginning and 177.9MB in the end (delta: -110.5MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. * RCFGBuilder took 471280.48ms. Allocated memory was 249.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 177.9MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 591.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1460.58ms. Allocated memory is still 1.3GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 87.0MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. * Witness Printer took 6.51ms. Allocated memory is still 1.3GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 209, overapproximation of bitwiseAnd at line 160. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_24 = 0; [L39] const SORT_4 var_57 = 1; [L40] const SORT_4 var_58 = 0; [L41] const SORT_2 var_68 = 2; [L42] const SORT_2 var_70 = 1; [L43] const SORT_2 var_72 = 0; [L44] const SORT_2 var_108 = 6; [L45] const SORT_2 var_109 = 255; [L46] const SORT_2 var_118 = 24; [L47] const SORT_2 var_127 = 14; [L48] const SORT_3 var_292 = 0; [L49] const SORT_4 var_294 = 6; [L50] const SORT_4 var_326 = 24; [L51] const SORT_4 var_358 = 14; [L53] SORT_1 input_67; [L54] SORT_1 input_69; [L55] SORT_1 input_71; [L56] SORT_1 input_73; [L57] SORT_1 input_79; [L58] SORT_1 input_82; [L59] SORT_1 input_83; [L60] SORT_1 input_84; [L61] SORT_1 input_85; [L62] SORT_1 input_91; [L63] SORT_1 input_94; [L64] SORT_1 input_95; [L65] SORT_1 input_96; [L66] SORT_1 input_97; [L67] SORT_1 input_103; [L68] SORT_1 input_106; [L69] SORT_1 input_107; [L70] SORT_1 input_116; [L71] SORT_1 input_117; [L72] SORT_1 input_125; [L73] SORT_1 input_126; [L74] SORT_1 input_141; [L75] SORT_1 input_143; [L76] SORT_1 input_162; [L77] SORT_1 input_164; [L78] SORT_1 input_183; [L79] SORT_1 input_185; [L81] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L82] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L83] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L88] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L89] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L90] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_2 init_7_arg_1 = var_5; [L108] state_6 = init_7_arg_1 [L109] SORT_2 init_9_arg_1 = var_5; [L110] state_8 = init_9_arg_1 [L111] SORT_2 init_11_arg_1 = var_5; [L112] state_10 = init_11_arg_1 [L113] SORT_2 init_13_arg_1 = var_5; [L114] state_12 = init_13_arg_1 [L115] SORT_2 init_15_arg_1 = var_5; [L116] state_14 = init_15_arg_1 [L117] SORT_2 init_17_arg_1 = var_5; [L118] state_16 = init_17_arg_1 [L119] SORT_2 init_19_arg_1 = var_5; [L120] state_18 = init_19_arg_1 [L121] SORT_2 init_21_arg_1 = var_5; [L122] state_20 = init_21_arg_1 [L123] SORT_2 init_23_arg_1 = var_5; [L124] state_22 = init_23_arg_1 [L125] SORT_1 init_26_arg_1 = var_24; [L126] state_25 = init_26_arg_1 [L127] SORT_1 init_28_arg_1 = var_24; [L128] state_27 = init_28_arg_1 [L129] SORT_1 init_30_arg_1 = var_24; [L130] state_29 = init_30_arg_1 [L131] SORT_1 init_32_arg_1 = var_24; [L132] state_31 = init_32_arg_1 [L133] SORT_1 init_34_arg_1 = var_24; [L134] state_33 = init_34_arg_1 [L135] SORT_1 init_36_arg_1 = var_24; [L136] state_35 = init_36_arg_1 [L137] SORT_1 init_38_arg_1 = var_24; [L138] state_37 = init_38_arg_1 [L139] SORT_1 init_40_arg_1 = var_24; [L140] state_39 = init_40_arg_1 [L141] SORT_1 init_42_arg_1 = var_24; [L142] state_41 = init_42_arg_1 [L143] SORT_1 init_44_arg_1 = var_24; [L144] state_43 = init_44_arg_1 [L145] SORT_1 init_46_arg_1 = var_24; [L146] state_45 = init_46_arg_1 [L147] SORT_1 init_48_arg_1 = var_24; [L148] state_47 = init_48_arg_1 [L149] SORT_1 init_50_arg_1 = var_24; [L150] state_49 = init_50_arg_1 [L151] SORT_1 init_52_arg_1 = var_24; [L152] state_51 = init_52_arg_1 [L153] SORT_1 init_54_arg_1 = var_24; [L154] state_53 = init_54_arg_1 [L155] SORT_1 init_56_arg_1 = var_24; [L156] state_55 = init_56_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_6=0, state_8=0, var_108=6, var_109=255, var_118=24, var_127=14, var_24=0, var_292=0, var_294=6, var_326=24, var_358=14, var_5=0, var_57=1, var_58=0, var_68=2, var_70=1, var_72=0] [L159] input_67 = __VERIFIER_nondet_uchar() [L160] input_67 = input_67 & mask_SORT_1 [L161] input_69 = __VERIFIER_nondet_uchar() [L162] input_69 = input_69 & mask_SORT_1 [L163] input_71 = __VERIFIER_nondet_uchar() [L164] input_71 = input_71 & mask_SORT_1 [L165] input_73 = __VERIFIER_nondet_uchar() [L166] input_73 = input_73 & mask_SORT_1 [L167] input_79 = __VERIFIER_nondet_uchar() [L168] input_79 = input_79 & mask_SORT_1 [L169] input_82 = __VERIFIER_nondet_uchar() [L170] input_82 = input_82 & mask_SORT_1 [L171] input_83 = __VERIFIER_nondet_uchar() [L172] input_83 = input_83 & mask_SORT_1 [L173] input_84 = __VERIFIER_nondet_uchar() [L174] input_84 = input_84 & mask_SORT_1 [L175] input_85 = __VERIFIER_nondet_uchar() [L176] input_85 = input_85 & mask_SORT_1 [L177] input_91 = __VERIFIER_nondet_uchar() [L178] input_91 = input_91 & mask_SORT_1 [L179] input_94 = __VERIFIER_nondet_uchar() [L180] input_94 = input_94 & mask_SORT_1 [L181] input_95 = __VERIFIER_nondet_uchar() [L182] input_95 = input_95 & mask_SORT_1 [L183] input_96 = __VERIFIER_nondet_uchar() [L184] input_96 = input_96 & mask_SORT_1 [L185] input_97 = __VERIFIER_nondet_uchar() [L186] input_97 = input_97 & mask_SORT_1 [L187] input_103 = __VERIFIER_nondet_uchar() [L188] input_103 = input_103 & mask_SORT_1 [L189] input_106 = __VERIFIER_nondet_uchar() [L190] input_106 = input_106 & mask_SORT_1 [L191] input_107 = __VERIFIER_nondet_uchar() [L192] input_107 = input_107 & mask_SORT_1 [L193] input_116 = __VERIFIER_nondet_uchar() [L194] input_116 = input_116 & mask_SORT_1 [L195] input_117 = __VERIFIER_nondet_uchar() [L196] input_117 = input_117 & mask_SORT_1 [L197] input_125 = __VERIFIER_nondet_uchar() [L198] input_125 = input_125 & mask_SORT_1 [L199] input_126 = __VERIFIER_nondet_uchar() [L200] input_126 = input_126 & mask_SORT_1 [L201] input_141 = __VERIFIER_nondet_uchar() [L202] input_143 = __VERIFIER_nondet_uchar() [L203] input_162 = __VERIFIER_nondet_uchar() [L204] input_164 = __VERIFIER_nondet_uchar() [L205] input_183 = __VERIFIER_nondet_uchar() [L206] input_185 = __VERIFIER_nondet_uchar() [L209] SORT_1 var_59_arg_0 = ~state_27; [L210] var_59_arg_0 = var_59_arg_0 & mask_SORT_1 [L211] SORT_4 var_59_arg_1 = var_57; [L212] SORT_4 var_59_arg_2 = var_58; [L213] EXPR var_59_arg_0 ? var_59_arg_1 : var_59_arg_2 [L213] SORT_4 var_59 = var_59_arg_0 ? var_59_arg_1 : var_59_arg_2; [L214] SORT_1 var_60_arg_0 = state_33; [L215] SORT_4 var_60_arg_1 = var_57; [L216] SORT_4 var_60_arg_2 = var_58; [L217] EXPR var_60_arg_0 ? var_60_arg_1 : var_60_arg_2 [L217] SORT_4 var_60 = var_60_arg_0 ? var_60_arg_1 : var_60_arg_2; [L218] SORT_4 var_61_arg_0 = var_59; [L219] SORT_4 var_61_arg_1 = var_60; [L220] SORT_4 var_61 = var_61_arg_0 + var_61_arg_1; [L221] SORT_1 var_62_arg_0 = state_39; [L222] SORT_4 var_62_arg_1 = var_57; [L223] SORT_4 var_62_arg_2 = var_58; [L224] EXPR var_62_arg_0 ? var_62_arg_1 : var_62_arg_2 [L224] SORT_4 var_62 = var_62_arg_0 ? var_62_arg_1 : var_62_arg_2; [L225] SORT_4 var_63_arg_0 = var_61; [L226] SORT_4 var_63_arg_1 = var_62; [L227] SORT_4 var_63 = var_63_arg_0 + var_63_arg_1; [L228] var_63 = var_63 & mask_SORT_4 [L229] SORT_4 var_64_arg_0 = var_63; [L230] SORT_4 var_64_arg_1 = var_57; [L231] SORT_1 var_64 = var_64_arg_0 <= var_64_arg_1; [L232] SORT_1 var_65_arg_0 = ~state_55; [L233] var_65_arg_0 = var_65_arg_0 & mask_SORT_1 [L234] SORT_1 var_65_arg_1 = ~var_64; [L235] var_65_arg_1 = var_65_arg_1 & mask_SORT_1 [L236] SORT_1 var_65 = var_65_arg_0 & var_65_arg_1; [L237] var_65 = var_65 & mask_SORT_1 [L238] SORT_1 bad_66_arg_0 = var_65; [L239] CALL __VERIFIER_assert(!(bad_66_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:51:28,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash b48bd99976d95d3d7781e3907aa9eed49a14d14a98b72da29a590c48eef8f00e --- 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-5e519f3 [2022-11-03 01:51:30,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:51:30,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:51:30,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:51:30,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:51:30,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:51:30,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:51:30,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:51:30,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:51:30,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:51:30,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:51:30,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:51:30,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:51:30,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:51:30,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:51:30,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:51:30,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:51:30,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:51:30,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:51:30,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:51:30,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:51:30,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:51:30,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:51:30,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:51:30,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:51:30,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:51:30,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:51:30,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:51:30,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:51:30,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:51:30,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:51:30,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:51:30,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:51:30,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:51:30,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:51:30,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:51:30,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:51:30,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:51:30,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:51:30,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:51:30,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:51:30,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:51:30,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:51:30,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:51:30,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:51:30,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:51:30,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:51:30,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:51:30,837 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:51:30,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:51:30,838 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:51:30,838 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:51:30,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:51:30,838 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:51:30,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:51:30,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:51:30,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:51:30,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:51:30,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:51:30,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:51:30,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:51:30,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:51:30,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:51:30,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:30,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:51:30,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:51:30,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:51:30,842 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:51:30,842 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:30,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:51:30,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:51:30,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:51:30,843 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b48bd99976d95d3d7781e3907aa9eed49a14d14a98b72da29a590c48eef8f00e [2022-11-03 01:51:31,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:51:31,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:51:31,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:51:31,282 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:51:31,285 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:51:31,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:51:31,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/cefb4ce3c/df9b4849ad5541a9bc1c448bb2ad00f8/FLAG163f5472f [2022-11-03 01:51:32,249 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:51:32,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:51:32,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/cefb4ce3c/df9b4849ad5541a9bc1c448bb2ad00f8/FLAG163f5472f [2022-11-03 01:51:32,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/data/cefb4ce3c/df9b4849ad5541a9bc1c448bb2ad00f8 [2022-11-03 01:51:32,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:51:32,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:51:32,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:32,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:51:32,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:51:32,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:32" (1/1) ... [2022-11-03 01:51:32,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b306004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:32, skipping insertion in model container [2022-11-03 01:51:32,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:32" (1/1) ... [2022-11-03 01:51:32,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:51:32,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:51:32,626 WARN L230 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_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c[1014,1027] [2022-11-03 01:51:33,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:33,080 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:51:33,100 WARN L230 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_04bf767e-6ef4-41f6-8679-67b9154f2196/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lann.1.prop1-func-interl.c[1014,1027] [2022-11-03 01:51:33,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:33,229 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:51:33,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33 WrapperNode [2022-11-03 01:51:33,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:33,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:33,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:51:33,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:51:33,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,422 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1836 [2022-11-03 01:51:33,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:33,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:51:33,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:51:33,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:51:33,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:51:33,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:51:33,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:51:33,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:51:33,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (1/1) ... [2022-11-03 01:51:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:33,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:51:33,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:51:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:51:33,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:51:34,212 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:51:34,215 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:51:37,178 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:51:37,187 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:51:37,187 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:51:37,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:37 BoogieIcfgContainer [2022-11-03 01:51:37,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:51:37,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:51:37,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:51:37,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:51:37,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:51:32" (1/3) ... [2022-11-03 01:51:37,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e38e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:37, skipping insertion in model container [2022-11-03 01:51:37,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:33" (2/3) ... [2022-11-03 01:51:37,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e38e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:37, skipping insertion in model container [2022-11-03 01:51:37,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:37" (3/3) ... [2022-11-03 01:51:37,199 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lann.1.prop1-func-interl.c [2022-11-03 01:51:37,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:51:37,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:51:37,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:51:37,316 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;@5ef8b86b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:51:37,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:51:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 76 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:51:37,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:37,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:37,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 01:51:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:37,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227091984] [2022-11-03 01:51:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:37,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:37,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:37,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:51:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:51:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:38,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:38,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:38,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227091984] [2022-11-03 01:51:38,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227091984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:38,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:38,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:51:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479869916] [2022-11-03 01:51:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:51:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:51:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:51:38,045 INFO L87 Difference]: Start difference. First operand has 77 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 76 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:38,498 INFO L93 Difference]: Finished difference Result 289 states and 431 transitions. [2022-11-03 01:51:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:51:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-11-03 01:51:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:38,512 INFO L225 Difference]: With dead ends: 289 [2022-11-03 01:51:38,512 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 01:51:38,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:51:38,518 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 299 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:38,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 409 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:51:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 01:51:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 77. [2022-11-03 01:51:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 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) [2022-11-03 01:51:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2022-11-03 01:51:38,562 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 11 [2022-11-03 01:51:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:38,563 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2022-11-03 01:51:38,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2022-11-03 01:51:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:51:38,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:38,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:38,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:38,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:38,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1416387405, now seen corresponding path program 1 times [2022-11-03 01:51:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042058223] [2022-11-03 01:51:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:38,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:38,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:38,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:51:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:51:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:39,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:39,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042058223] [2022-11-03 01:51:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042058223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:39,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:39,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:51:39,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820185887] [2022-11-03 01:51:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:51:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:51:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:51:39,252 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:39,677 INFO L93 Difference]: Finished difference Result 285 states and 415 transitions. [2022-11-03 01:51:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:51:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-11-03 01:51:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:39,688 INFO L225 Difference]: With dead ends: 285 [2022-11-03 01:51:39,689 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 01:51:39,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:51:39,691 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 293 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 408 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:51:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 01:51:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 79. [2022-11-03 01:51:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 78 states have internal predecessors, (113), 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) [2022-11-03 01:51:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2022-11-03 01:51:39,714 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 11 [2022-11-03 01:51:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:39,715 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2022-11-03 01:51:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2022-11-03 01:51:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:51:39,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:39,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:39,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:39,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:39,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1416327823, now seen corresponding path program 1 times [2022-11-03 01:51:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919260729] [2022-11-03 01:51:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:39,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:39,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:39,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:39,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:51:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:51:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:40,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:40,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:40,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919260729] [2022-11-03 01:51:40,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919260729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:40,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:40,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637506517] [2022-11-03 01:51:40,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:40,793 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-11-03 01:51:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:42,443 INFO L93 Difference]: Finished difference Result 313 states and 450 transitions. [2022-11-03 01:51:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:51:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 11 [2022-11-03 01:51:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:42,446 INFO L225 Difference]: With dead ends: 313 [2022-11-03 01:51:42,446 INFO L226 Difference]: Without dead ends: 311 [2022-11-03 01:51:42,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:51:42,448 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 813 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:42,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 980 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:51:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-03 01:51:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 89. [2022-11-03 01:51:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4204545454545454) internal successors, (125), 88 states have internal predecessors, (125), 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) [2022-11-03 01:51:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 125 transitions. [2022-11-03 01:51:42,459 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 125 transitions. Word has length 11 [2022-11-03 01:51:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:42,459 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 125 transitions. [2022-11-03 01:51:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-11-03 01:51:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 125 transitions. [2022-11-03 01:51:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:51:42,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:42,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:42,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:42,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:42,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 01:51:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:42,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657877963] [2022-11-03 01:51:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:42,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:42,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:42,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:51:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:51:43,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:43,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:43,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657877963] [2022-11-03 01:51:43,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657877963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:43,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:43,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:51:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777914493] [2022-11-03 01:51:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:51:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:51:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:51:43,120 INFO L87 Difference]: Start difference. First operand 89 states and 125 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:43,413 INFO L93 Difference]: Finished difference Result 230 states and 331 transitions. [2022-11-03 01:51:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:51:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-11-03 01:51:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:43,416 INFO L225 Difference]: With dead ends: 230 [2022-11-03 01:51:43,416 INFO L226 Difference]: Without dead ends: 149 [2022-11-03 01:51:43,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:51:43,418 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 195 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:43,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:51:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-03 01:51:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 85. [2022-11-03 01:51:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 84 states have internal predecessors, (120), 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) [2022-11-03 01:51:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2022-11-03 01:51:43,427 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 11 [2022-11-03 01:51:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:43,428 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2022-11-03 01:51:43,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-03 01:51:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2022-11-03 01:51:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:51:43,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:43,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:43,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:43,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:43,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 271398229, now seen corresponding path program 1 times [2022-11-03 01:51:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872287495] [2022-11-03 01:51:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:43,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:43,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:51:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:51:44,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:45,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:45,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:45,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872287495] [2022-11-03 01:51:45,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872287495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:45,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:45,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:51:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355649878] [2022-11-03 01:51:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:51:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:51:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:51:45,080 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:51:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:45,428 INFO L93 Difference]: Finished difference Result 208 states and 300 transitions. [2022-11-03 01:51:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:51:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2022-11-03 01:51:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:45,430 INFO L225 Difference]: With dead ends: 208 [2022-11-03 01:51:45,430 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 01:51:45,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:51:45,431 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 80 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:45,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 468 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-11-03 01:51:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 01:51:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-03 01:51:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 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) [2022-11-03 01:51:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2022-11-03 01:51:45,450 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 80 [2022-11-03 01:51:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:45,450 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2022-11-03 01:51:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:51:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2022-11-03 01:51:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:51:45,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:45,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:45,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:45,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1651829805, now seen corresponding path program 1 times [2022-11-03 01:51:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717008683] [2022-11-03 01:51:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:45,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:45,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:51:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:51:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:47,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:48,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717008683] [2022-11-03 01:51:48,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717008683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2013004616] [2022-11-03 01:51:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:51:48,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:51:48,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 01:51:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:51:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:50,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2013004616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430468158] [2022-11-03 01:51:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:50,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:50,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:50,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:50,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:51:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:51,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:51:51,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:52,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:53,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430468158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:53,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:51:53,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 24 [2022-11-03 01:51:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112860552] [2022-11-03 01:51:53,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:53,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:51:53,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:53,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:51:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:53,443 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand has 24 states, 24 states have (on average 12.625) internal successors, (303), 24 states have internal predecessors, (303), 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) [2022-11-03 01:51:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:54,158 INFO L93 Difference]: Finished difference Result 305 states and 443 transitions. [2022-11-03 01:51:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:51:54,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 12.625) internal successors, (303), 24 states have internal predecessors, (303), 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 80 [2022-11-03 01:51:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:54,160 INFO L225 Difference]: With dead ends: 305 [2022-11-03 01:51:54,160 INFO L226 Difference]: Without dead ends: 228 [2022-11-03 01:51:54,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:51:54,165 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 445 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:54,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1316 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-11-03 01:51:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-03 01:51:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-11-03 01:51:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.4537444933920705) internal successors, (330), 227 states have internal predecessors, (330), 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) [2022-11-03 01:51:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2022-11-03 01:51:54,184 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 80 [2022-11-03 01:51:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:54,184 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2022-11-03 01:51:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.625) internal successors, (303), 24 states have internal predecessors, (303), 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) [2022-11-03 01:51:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2022-11-03 01:51:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:51:54,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:54,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:54,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:54,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:54,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:54,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:54,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1833790865, now seen corresponding path program 1 times [2022-11-03 01:51:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962837789] [2022-11-03 01:51:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:54,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:54,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:51:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:51:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:56,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:56,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962837789] [2022-11-03 01:51:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962837789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190709419] [2022-11-03 01:51:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:51:56,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:51:56,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 01:51:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:51:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:58,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190709419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:59,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359472613] [2022-11-03 01:51:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:59,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:59,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:59,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:51:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:51:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:00,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:01,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359472613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:01,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:01,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 24 [2022-11-03 01:52:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407754360] [2022-11-03 01:52:01,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:52:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:52:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:52:01,709 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 24 states, 24 states have (on average 12.708333333333334) internal successors, (305), 24 states have internal predecessors, (305), 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) [2022-11-03 01:52:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:02,169 INFO L93 Difference]: Finished difference Result 479 states and 699 transitions. [2022-11-03 01:52:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:52:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 12.708333333333334) internal successors, (305), 24 states have internal predecessors, (305), 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 80 [2022-11-03 01:52:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:02,173 INFO L225 Difference]: With dead ends: 479 [2022-11-03 01:52:02,173 INFO L226 Difference]: Without dead ends: 402 [2022-11-03 01:52:02,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 452 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:52:02,175 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 323 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:02,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1473 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-11-03 01:52:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-03 01:52:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-03 01:52:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.453865336658354) internal successors, (583), 401 states have internal predecessors, (583), 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) [2022-11-03 01:52:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 583 transitions. [2022-11-03 01:52:02,218 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 583 transitions. Word has length 80 [2022-11-03 01:52:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:02,219 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 583 transitions. [2022-11-03 01:52:02,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.708333333333334) internal successors, (305), 24 states have internal predecessors, (305), 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) [2022-11-03 01:52:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 583 transitions. [2022-11-03 01:52:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:02,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:02,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:02,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:02,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:02,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:02,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1891108749, now seen corresponding path program 1 times [2022-11-03 01:52:02,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:02,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284294606] [2022-11-03 01:52:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:02,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:02,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:52:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 01:52:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:11,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284294606] [2022-11-03 01:52:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284294606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1833738493] [2022-11-03 01:52:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:11,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:11,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 01:52:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 01:52:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:14,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1833738493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51675263] [2022-11-03 01:53:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:11,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:11,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:12,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:53:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:53:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:53:14,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:53:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51675263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:19,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:19,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 01:53:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384948911] [2022-11-03 01:53:19,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 01:53:19,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 01:53:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1323, Unknown=27, NotChecked=0, Total=1560 [2022-11-03 01:53:19,610 INFO L87 Difference]: Start difference. First operand 402 states and 583 transitions. Second operand has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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) [2022-11-03 01:53:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:23,099 INFO L93 Difference]: Finished difference Result 931 states and 1357 transitions. [2022-11-03 01:53:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:53:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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 80 [2022-11-03 01:53:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:23,103 INFO L225 Difference]: With dead ends: 931 [2022-11-03 01:53:23,103 INFO L226 Difference]: Without dead ends: 929 [2022-11-03 01:53:23,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 445 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=527, Invalid=3106, Unknown=27, NotChecked=0, Total=3660 [2022-11-03 01:53:23,106 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 1223 mSDsluCounter, 5031 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 5294 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:23,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 5294 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-11-03 01:53:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-11-03 01:53:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 823. [2022-11-03 01:53:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 1.4586374695863746) internal successors, (1199), 822 states have internal predecessors, (1199), 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) [2022-11-03 01:53:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1199 transitions. [2022-11-03 01:53:23,136 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1199 transitions. Word has length 80 [2022-11-03 01:53:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 823 states and 1199 transitions. [2022-11-03 01:53:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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) [2022-11-03 01:53:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1199 transitions. [2022-11-03 01:53:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:53:23,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:23,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:23,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:23,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:23,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:23,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:23,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1702793969, now seen corresponding path program 1 times [2022-11-03 01:53:23,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:23,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344979349] [2022-11-03 01:53:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:23,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:23,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:23,764 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:53:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:53:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:26,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:34,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344979349] [2022-11-03 01:53:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344979349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814275412] [2022-11-03 01:53:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:34,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:34,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:34,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 01:53:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:53:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:43,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1814275412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:43,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300202277] [2022-11-03 01:54:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:43,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:43,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:43,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:54:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:54:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:54:45,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:54:51,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300202277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:51,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:51,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 01:54:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576345637] [2022-11-03 01:54:51,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:51,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 01:54:51,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 01:54:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1319, Unknown=32, NotChecked=0, Total=1560 [2022-11-03 01:54:51,091 INFO L87 Difference]: Start difference. First operand 823 states and 1199 transitions. Second operand has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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) [2022-11-03 01:55:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:04,926 INFO L93 Difference]: Finished difference Result 2320 states and 3392 transitions. [2022-11-03 01:55:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 01:55:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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 80 [2022-11-03 01:55:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:04,935 INFO L225 Difference]: With dead ends: 2320 [2022-11-03 01:55:04,935 INFO L226 Difference]: Without dead ends: 2318 [2022-11-03 01:55:04,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 455 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=772, Invalid=4896, Unknown=32, NotChecked=0, Total=5700 [2022-11-03 01:55:04,938 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 1527 mSDsluCounter, 5375 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 5627 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:04,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 5627 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 195 Unchecked, 0.1s Time] [2022-11-03 01:55:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-11-03 01:55:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2030. [2022-11-03 01:55:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.4642681123706258) internal successors, (2971), 2029 states have internal predecessors, (2971), 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) [2022-11-03 01:55:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2971 transitions. [2022-11-03 01:55:05,015 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2971 transitions. Word has length 80 [2022-11-03 01:55:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:05,015 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2971 transitions. [2022-11-03 01:55:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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) [2022-11-03 01:55:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2971 transitions. [2022-11-03 01:55:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:05,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:05,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:05,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-03 01:55:05,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:05,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:05,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:05,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1312309649, now seen corresponding path program 1 times [2022-11-03 01:55:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:05,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450133490] [2022-11-03 01:55:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:05,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:05,634 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:05,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:55:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:06,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 01:55:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:07,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:15,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:15,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450133490] [2022-11-03 01:55:15,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450133490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:15,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783008175] [2022-11-03 01:55:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:15,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:15,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:15,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:55:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 01:55:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:18,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783008175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75541311] [2022-11-03 01:55:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:19,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:19,640 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:19,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:55:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:55:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:55:21,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:55:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75541311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:26,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:26,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11, 11] total 30 [2022-11-03 01:55:26,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920943720] [2022-11-03 01:55:26,185 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 01:55:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 01:55:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=767, Unknown=3, NotChecked=0, Total=870 [2022-11-03 01:55:26,187 INFO L87 Difference]: Start difference. First operand 2030 states and 2971 transitions. Second operand has 30 states, 30 states have (on average 10.4) internal successors, (312), 30 states have internal predecessors, (312), 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) [2022-11-03 01:55:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:28,830 INFO L93 Difference]: Finished difference Result 3453 states and 5052 transitions. [2022-11-03 01:55:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:55:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 10.4) internal successors, (312), 30 states have internal predecessors, (312), 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 80 [2022-11-03 01:55:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:28,844 INFO L225 Difference]: With dead ends: 3453 [2022-11-03 01:55:28,844 INFO L226 Difference]: Without dead ends: 3451 [2022-11-03 01:55:28,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=260, Invalid=1807, Unknown=3, NotChecked=0, Total=2070 [2022-11-03 01:55:28,847 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 793 mSDsluCounter, 3483 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:28,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 3657 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-11-03 01:55:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2022-11-03 01:55:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3191. [2022-11-03 01:55:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.4699059561128527) internal successors, (4689), 3190 states have internal predecessors, (4689), 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) [2022-11-03 01:55:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4689 transitions. [2022-11-03 01:55:28,956 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4689 transitions. Word has length 80 [2022-11-03 01:55:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:28,957 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 4689 transitions. [2022-11-03 01:55:28,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.4) internal successors, (312), 30 states have internal predecessors, (312), 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) [2022-11-03 01:55:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4689 transitions. [2022-11-03 01:55:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:28,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:28,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:28,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:29,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:29,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:29,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:29,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058281, now seen corresponding path program 1 times [2022-11-03 01:55:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228916494] [2022-11-03 01:55:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:29,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:29,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:55:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:55:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:30,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:30,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:30,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228916494] [2022-11-03 01:55:30,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228916494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:30,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:30,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:55:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920341647] [2022-11-03 01:55:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:55:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:55:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:55:30,543 INFO L87 Difference]: Start difference. First operand 3191 states and 4689 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:55:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:31,052 INFO L93 Difference]: Finished difference Result 5004 states and 7317 transitions. [2022-11-03 01:55:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:55:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2022-11-03 01:55:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:31,064 INFO L225 Difference]: With dead ends: 5004 [2022-11-03 01:55:31,064 INFO L226 Difference]: Without dead ends: 4010 [2022-11-03 01:55:31,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:55:31,067 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 103 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:31,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 946 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 14 Unchecked, 0.4s Time] [2022-11-03 01:55:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-11-03 01:55:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3333. [2022-11-03 01:55:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.4687875150060024) internal successors, (4894), 3332 states have internal predecessors, (4894), 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) [2022-11-03 01:55:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4894 transitions. [2022-11-03 01:55:31,178 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4894 transitions. Word has length 80 [2022-11-03 01:55:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:31,179 INFO L495 AbstractCegarLoop]: Abstraction has 3333 states and 4894 transitions. [2022-11-03 01:55:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:55:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4894 transitions. [2022-11-03 01:55:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:31,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:31,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:31,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:31,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 826965273, now seen corresponding path program 1 times [2022-11-03 01:55:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:31,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960850224] [2022-11-03 01:55:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:31,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:31,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:31,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:55:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:32,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:55:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:32,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:33,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960850224] [2022-11-03 01:55:33,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960850224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279593718] [2022-11-03 01:55:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:33,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:33,774 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:33,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 01:55:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:55:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:35,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:36,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279593718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829578122] [2022-11-03 01:55:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:36,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:36,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:36,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 01:55:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:55:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:38,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829578122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:38,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:38,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 01:55:38,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132692526] [2022-11-03 01:55:38,323 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:38,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:55:38,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:55:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:38,324 INFO L87 Difference]: Start difference. First operand 3333 states and 4894 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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) [2022-11-03 01:55:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:38,568 INFO L93 Difference]: Finished difference Result 4555 states and 6694 transitions. [2022-11-03 01:55:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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 80 [2022-11-03 01:55:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:38,575 INFO L225 Difference]: With dead ends: 4555 [2022-11-03 01:55:38,575 INFO L226 Difference]: Without dead ends: 3605 [2022-11-03 01:55:38,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 459 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:38,577 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 329 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:38,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 637 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-03 01:55:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2022-11-03 01:55:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 3605. [2022-11-03 01:55:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 1.4655937846836848) internal successors, (5282), 3604 states have internal predecessors, (5282), 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) [2022-11-03 01:55:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5282 transitions. [2022-11-03 01:55:38,691 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5282 transitions. Word has length 80 [2022-11-03 01:55:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:38,691 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5282 transitions. [2022-11-03 01:55:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 14 states have internal predecessors, (157), 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) [2022-11-03 01:55:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5282 transitions. [2022-11-03 01:55:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:38,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:38,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:38,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:38,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:39,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-03 01:55:39,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:39,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 827024855, now seen corresponding path program 1 times [2022-11-03 01:55:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584687836] [2022-11-03 01:55:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:39,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:39,308 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:39,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:55:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:55:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:41,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:47,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584687836] [2022-11-03 01:55:47,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584687836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779420607] [2022-11-03 01:55:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:47,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:47,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:47,190 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:47,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 01:55:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 01:55:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:49,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779420607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886842443] [2022-11-03 01:55:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:59,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:59,860 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:59,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 01:56:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:56:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:56:02,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:56:08,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886842443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:08,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:56:08,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11, 11] total 38 [2022-11-03 01:56:08,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461044047] [2022-11-03 01:56:08,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:08,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:56:08,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:56:08,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:56:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1271, Unknown=2, NotChecked=0, Total=1406 [2022-11-03 01:56:08,134 INFO L87 Difference]: Start difference. First operand 3605 states and 5282 transitions. Second operand has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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) [2022-11-03 01:56:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:11,312 INFO L93 Difference]: Finished difference Result 6444 states and 9388 transitions. [2022-11-03 01:56:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 01:56:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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 80 [2022-11-03 01:56:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:11,331 INFO L225 Difference]: With dead ends: 6444 [2022-11-03 01:56:11,331 INFO L226 Difference]: Without dead ends: 6442 [2022-11-03 01:56:11,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=367, Invalid=2823, Unknown=2, NotChecked=0, Total=3192 [2022-11-03 01:56:11,334 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 800 mSDsluCounter, 3171 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:11,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 3300 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-11-03 01:56:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2022-11-03 01:56:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 6201. [2022-11-03 01:56:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6201 states, 6200 states have (on average 1.4624193548387097) internal successors, (9067), 6200 states have internal predecessors, (9067), 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) [2022-11-03 01:56:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6201 states to 6201 states and 9067 transitions. [2022-11-03 01:56:11,527 INFO L78 Accepts]: Start accepts. Automaton has 6201 states and 9067 transitions. Word has length 80 [2022-11-03 01:56:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:11,528 INFO L495 AbstractCegarLoop]: Abstraction has 6201 states and 9067 transitions. [2022-11-03 01:56:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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) [2022-11-03 01:56:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 6201 states and 9067 transitions. [2022-11-03 01:56:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:56:11,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:11,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:11,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:11,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 01:56:11,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:56:12,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1249726681, now seen corresponding path program 1 times [2022-11-03 01:56:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:56:12,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542906589] [2022-11-03 01:56:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:12,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:56:12,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:56:12,152 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:56:12,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:56:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:56:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:14,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:24,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:56:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542906589] [2022-11-03 01:56:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542906589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659274910] [2022-11-03 01:56:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:56:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:56:24,128 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:56:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 01:56:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 01:56:25,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:32,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659274910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:32,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172388679] [2022-11-03 01:56:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:32,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:32,027 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:32,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 01:56:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:56:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:56:34,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:56:39,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172388679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:39,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:56:39,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11, 11] total 38 [2022-11-03 01:56:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488974766] [2022-11-03 01:56:39,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:39,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:56:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:56:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:56:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1271, Unknown=2, NotChecked=0, Total=1406 [2022-11-03 01:56:39,815 INFO L87 Difference]: Start difference. First operand 6201 states and 9067 transitions. Second operand has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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) [2022-11-03 01:56:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:42,965 INFO L93 Difference]: Finished difference Result 7240 states and 10510 transitions. [2022-11-03 01:56:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:56:42,966 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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 80 [2022-11-03 01:56:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:42,987 INFO L225 Difference]: With dead ends: 7240 [2022-11-03 01:56:42,987 INFO L226 Difference]: Without dead ends: 7238 [2022-11-03 01:56:42,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=333, Invalid=2635, Unknown=2, NotChecked=0, Total=2970 [2022-11-03 01:56:42,991 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 701 mSDsluCounter, 3758 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:42,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 3890 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 192 Unchecked, 0.1s Time] [2022-11-03 01:56:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2022-11-03 01:56:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 4305. [2022-11-03 01:56:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 1.4635223048327137) internal successors, (6299), 4304 states have internal predecessors, (6299), 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) [2022-11-03 01:56:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 6299 transitions. [2022-11-03 01:56:43,146 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 6299 transitions. Word has length 80 [2022-11-03 01:56:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:43,147 INFO L495 AbstractCegarLoop]: Abstraction has 4305 states and 6299 transitions. [2022-11-03 01:56:43,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.894736842105264) internal successors, (452), 38 states have internal predecessors, (452), 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) [2022-11-03 01:56:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 6299 transitions. [2022-11-03 01:56:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:56:43,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:43,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:43,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:43,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:43,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:43,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:56:43,777 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 569860951, now seen corresponding path program 1 times [2022-11-03 01:56:43,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:56:43,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159874850] [2022-11-03 01:56:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:56:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:56:43,780 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:56:43,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:56:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:56:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:44,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:44,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:56:44,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159874850] [2022-11-03 01:56:44,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159874850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:44,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:44,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:56:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67811539] [2022-11-03 01:56:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:56:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:56:44,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:56:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:56:44,730 INFO L87 Difference]: Start difference. First operand 4305 states and 6299 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:56:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:45,264 INFO L93 Difference]: Finished difference Result 5640 states and 8177 transitions. [2022-11-03 01:56:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2022-11-03 01:56:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:45,274 INFO L225 Difference]: With dead ends: 5640 [2022-11-03 01:56:45,274 INFO L226 Difference]: Without dead ends: 4921 [2022-11-03 01:56:45,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:56:45,278 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 103 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:45,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 797 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2022-11-03 01:56:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4921 states. [2022-11-03 01:56:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4921 to 4319. [2022-11-03 01:56:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4319 states, 4318 states have (on average 1.460861509958314) internal successors, (6308), 4318 states have internal predecessors, (6308), 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) [2022-11-03 01:56:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 6308 transitions. [2022-11-03 01:56:45,477 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 6308 transitions. Word has length 80 [2022-11-03 01:56:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:45,477 INFO L495 AbstractCegarLoop]: Abstraction has 4319 states and 6308 transitions. [2022-11-03 01:56:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2022-11-03 01:56:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 6308 transitions. [2022-11-03 01:56:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:56:45,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:45,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:45,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:45,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:56:45,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash -16945063, now seen corresponding path program 1 times [2022-11-03 01:56:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:56:45,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980671717] [2022-11-03 01:56:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:45,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:56:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:56:45,708 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:56:45,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:56:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:46,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:56:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:57,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:56:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980671717] [2022-11-03 01:56:57,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980671717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120407741] [2022-11-03 01:56:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:56:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:56:57,704 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:56:57,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 01:56:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:56:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:00,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:00,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2120407741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282481103] [2022-11-03 01:58:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:00,437 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:00,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04bf767e-6ef4-41f6-8679-67b9154f2196/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:58:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:58:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:58:03,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:58:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282481103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:08,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:08,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 01:58:08,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282814871] [2022-11-03 01:58:08,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:08,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 01:58:08,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 01:58:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1321, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 01:58:08,721 INFO L87 Difference]: Start difference. First operand 4319 states and 6308 transitions. Second operand has 40 states, 40 states have (on average 9.55) internal successors, (382), 40 states have internal predecessors, (382), 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)