./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 --- 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-38b53e6 [2022-11-25 18:15:21,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:15:21,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:15:21,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:15:21,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:15:21,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:15:21,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:15:21,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:15:21,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:15:21,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:15:21,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:15:21,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:15:21,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:15:21,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:15:21,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:15:21,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:15:21,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:15:21,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:15:21,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:15:21,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:15:21,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:15:21,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:15:21,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:15:21,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:15:21,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:15:21,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:15:21,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:15:21,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:15:21,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:15:21,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:15:21,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:15:21,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:15:21,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:15:21,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:15:21,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:15:21,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:15:21,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:15:21,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:15:21,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:15:21,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:15:21,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:15:21,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:15:21,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:15:21,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:15:21,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:15:21,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:15:21,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:15:21,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:15:21,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:15:21,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:15:21,886 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:15:21,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:15:21,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:15:21,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:15:21,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:15:21,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:15:21,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:15:21,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:15:21,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:15:21,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:15:21,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:15:21,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:15:21,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:15:21,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:15:21,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:15:21,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:15:21,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:15:21,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:15:21,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:15:21,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:15:21,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:15:21,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:15:21,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:15:21,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:15:21,894 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:15:21,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:15:21,894 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 [2022-11-25 18:15:22,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:15:22,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:15:22,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:15:22,216 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:15:22,216 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:15:22,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2022-11-25 18:15:25,314 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:15:25,488 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:15:25,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2022-11-25 18:15:25,496 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/data/7e46599a3/28927ed4587f4976b06f82e169bb8363/FLAG756a6b1a8 [2022-11-25 18:15:25,511 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/data/7e46599a3/28927ed4587f4976b06f82e169bb8363 [2022-11-25 18:15:25,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:15:25,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:15:25,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:15:25,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:15:25,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:15:25,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed80d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25, skipping insertion in model container [2022-11-25 18:15:25,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:15:25,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:15:25,683 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-11-25 18:15:25,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:15:25,711 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:15:25,724 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-11-25 18:15:25,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:15:25,745 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:15:25,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25 WrapperNode [2022-11-25 18:15:25,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:15:25,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:15:25,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:15:25,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:15:25,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,782 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-25 18:15:25,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:15:25,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:15:25,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:15:25,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:15:25,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,810 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:15:25,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:15:25,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:15:25,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:15:25,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (1/1) ... [2022-11-25 18:15:25,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:15:25,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:25,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:15:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:15:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:15:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:15:25,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:15:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:15:25,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:15:25,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:15:25,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:15:25,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:15:25,957 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:15:25,958 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:15:26,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:15:26,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:15:26,117 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:15:26,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:26 BoogieIcfgContainer [2022-11-25 18:15:26,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:15:26,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:15:26,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:15:26,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:15:26,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:15:25" (1/3) ... [2022-11-25 18:15:26,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2406e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:26, skipping insertion in model container [2022-11-25 18:15:26,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:25" (2/3) ... [2022-11-25 18:15:26,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2406e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:26, skipping insertion in model container [2022-11-25 18:15:26,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:26" (3/3) ... [2022-11-25 18:15:26,129 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2022-11-25 18:15:26,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:15:26,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:15:26,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:26,209 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=PETRI_NET, 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;@178312c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:26,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:15:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 18:15:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 18:15:26,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:26,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:26,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-11-25 18:15:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019851653] [2022-11-25 18:15:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:15:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:15:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 18:15:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:15:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:26,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019851653] [2022-11-25 18:15:26,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019851653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:26,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:26,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974422402] [2022-11-25 18:15:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:15:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:26,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:15:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:15:26,459 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:15:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:26,485 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-11-25 18:15:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:15:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 18:15:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:26,498 INFO L225 Difference]: With dead ends: 63 [2022-11-25 18:15:26,498 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 18:15:26,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:15:26,507 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:26,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:15:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 18:15:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 18:15:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 18:15:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-25 18:15:26,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-25 18:15:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:26,562 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-25 18:15:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:15:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-25 18:15:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 18:15:26,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:26,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:26,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:15:26,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-11-25 18:15:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:26,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10864642] [2022-11-25 18:15:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:26,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:15:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:15:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 18:15:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:15:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10864642] [2022-11-25 18:15:27,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10864642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:27,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:27,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399355892] [2022-11-25 18:15:27,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:27,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:27,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:27,055 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 18:15:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:27,151 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-25 18:15:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-11-25 18:15:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:27,153 INFO L225 Difference]: With dead ends: 42 [2022-11-25 18:15:27,153 INFO L226 Difference]: Without dead ends: 40 [2022-11-25 18:15:27,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:15:27,155 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:27,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:15:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-25 18:15:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-25 18:15:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 18:15:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 18:15:27,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-11-25 18:15:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:27,165 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 18:15:27,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 18:15:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 18:15:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 18:15:27,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:27,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:27,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:15:27,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-11-25 18:15:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454612379] [2022-11-25 18:15:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:15:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:15:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 18:15:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 18:15:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:15:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454612379] [2022-11-25 18:15:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454612379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584097360] [2022-11-25 18:15:27,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:27,571 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:15:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:27,668 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-25 18:15:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-25 18:15:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:27,670 INFO L225 Difference]: With dead ends: 46 [2022-11-25 18:15:27,670 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 18:15:27,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:15:27,672 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:27,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:15:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 18:15:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-25 18:15:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 18:15:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-25 18:15:27,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-11-25 18:15:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:27,684 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-25 18:15:27,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:15:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-25 18:15:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 18:15:27,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:27,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:27,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:15:27,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-11-25 18:15:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27574413] [2022-11-25 18:15:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:27,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:15:27,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199846097] [2022-11-25 18:15:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:27,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:27,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:27,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:15:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:15:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 18:15:28,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 18:15:28,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27574413] [2022-11-25 18:15:28,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:15:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199846097] [2022-11-25 18:15:28,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199846097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:28,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:15:28,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-25 18:15:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772471392] [2022-11-25 18:15:28,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:15:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:15:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:15:28,324 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:15:30,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:15:32,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:15:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:34,325 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-11-25 18:15:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2022-11-25 18:15:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:34,328 INFO L225 Difference]: With dead ends: 76 [2022-11-25 18:15:34,329 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 18:15:34,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:15:34,330 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:34,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-25 18:15:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 18:15:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-25 18:15:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 18:15:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-11-25 18:15:34,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2022-11-25 18:15:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:34,377 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-11-25 18:15:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:15:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-11-25 18:15:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 18:15:34,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:34,381 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:34,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:34,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:34,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-11-25 18:15:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427746485] [2022-11-25 18:15:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:34,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:15:34,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113661973] [2022-11-25 18:15:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:34,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:34,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:34,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:15:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:15:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 18:15:34,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:15:34,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:34,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427746485] [2022-11-25 18:15:34,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:15:34,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113661973] [2022-11-25 18:15:34,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113661973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:34,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:34,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:15:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674429434] [2022-11-25 18:15:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:34,968 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 18:15:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:35,889 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-11-25 18:15:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:15:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-11-25 18:15:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:35,894 INFO L225 Difference]: With dead ends: 72 [2022-11-25 18:15:35,894 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 18:15:35,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:15:35,895 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:35,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 18:15:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 18:15:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-25 18:15:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 18:15:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-25 18:15:35,920 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2022-11-25 18:15:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:35,924 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-25 18:15:35,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 18:15:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-25 18:15:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 18:15:35,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:35,929 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:35,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:36,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:36,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2022-11-25 18:15:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:36,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725559516] [2022-11-25 18:15:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:36,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:36,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:15:36,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984114481] [2022-11-25 18:15:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:36,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:36,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:36,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:15:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 18:15:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 18:15:36,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 18:15:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:38,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725559516] [2022-11-25 18:15:38,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:15:38,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984114481] [2022-11-25 18:15:38,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984114481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:38,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:15:38,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-25 18:15:38,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840354460] [2022-11-25 18:15:38,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:15:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:15:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:15:38,681 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-25 18:15:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:42,221 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-11-25 18:15:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:15:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2022-11-25 18:15:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:42,224 INFO L225 Difference]: With dead ends: 76 [2022-11-25 18:15:42,224 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 18:15:42,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:15:42,225 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:42,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-25 18:15:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 18:15:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-25 18:15:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 18:15:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-11-25 18:15:42,253 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2022-11-25 18:15:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-11-25 18:15:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-25 18:15:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-11-25 18:15:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 18:15:42,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:42,256 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:42,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:15:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:42,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2022-11-25 18:15:42,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896221696] [2022-11-25 18:15:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:42,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:15:42,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691853158] [2022-11-25 18:15:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:42,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:42,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:42,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:15:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:42,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:15:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 18:15:44,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-25 18:15:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896221696] [2022-11-25 18:15:44,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:15:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691853158] [2022-11-25 18:15:44,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691853158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:44,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:15:44,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-11-25 18:15:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073573359] [2022-11-25 18:15:44,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:44,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:15:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:15:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:15:44,695 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-25 18:15:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:15:46,578 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2022-11-25 18:15:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:15:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2022-11-25 18:15:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:15:46,581 INFO L225 Difference]: With dead ends: 133 [2022-11-25 18:15:46,581 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 18:15:46,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:15:46,582 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 74 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:15:46,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 216 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 18:15:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 18:15:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-11-25 18:15:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 45 states have internal predecessors, (46), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 18:15:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-11-25 18:15:46,607 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 68 [2022-11-25 18:15:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:15:46,607 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-11-25 18:15:46,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-25 18:15:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-11-25 18:15:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 18:15:46,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:15:46,609 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2022-11-25 18:15:46,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:15:46,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:15:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-11-25 18:15:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605214637] [2022-11-25 18:15:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:46,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:46,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:15:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500716570] [2022-11-25 18:15:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:46,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:46,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:46,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:46,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:15:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 18:15:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 18:15:47,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:10,051 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:16:36,148 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (let ((.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse3 (div .cse1 2))) (or (= .cse0 1) (<= .cse1 .cse2) (not (= .cse1 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (not (<= (mod .cse3 4294967296) .cse2)) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| (div .cse0 2)) (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 4294967295 .cse3)) 4294967296))))) is different from true [2022-11-25 18:18:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 17 refuted. 2 times theorem prover too weak. 88 trivial. 5 not checked. [2022-11-25 18:18:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:18:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605214637] [2022-11-25 18:18:17,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:18:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500716570] [2022-11-25 18:18:17,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500716570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:18:17,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:18:17,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-11-25 18:18:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520413819] [2022-11-25 18:18:17,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:18:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:18:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:18:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:18:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=379, Unknown=7, NotChecked=40, Total=506 [2022-11-25 18:18:17,526 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-25 18:18:19,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:18:23,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:18:29,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:18:38,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:18:42,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:18:55,091 WARN L233 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:18:59,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:04,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:06,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:08,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:10,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:12,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:14,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:17,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:19,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:23,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:25,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:27,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:38,880 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:19:40,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:42,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:43,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:19:46,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:20:07,825 WARN L233 SmtUtils]: Spent 18.36s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:20:09,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:20:10,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:20:12,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:20:14,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:20:59,042 WARN L233 SmtUtils]: Spent 42.00s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:21:01,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:06,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:08,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:10,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:12,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:15,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:18,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:19,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:26,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:27,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:29,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:31,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:33,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:48,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:51,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:21:52,240 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-11-25 18:21:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:21:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2022-11-25 18:21:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:21:52,242 INFO L225 Difference]: With dead ends: 116 [2022-11-25 18:21:52,242 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 18:21:52,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 146.8s TimeCoverageRelationStatistics Valid=166, Invalid=754, Unknown=14, NotChecked=58, Total=992 [2022-11-25 18:21:52,244 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 43 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 106.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:21:52,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 163 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 627 Invalid, 31 Unknown, 64 Unchecked, 106.3s Time] [2022-11-25 18:21:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 18:21:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2022-11-25 18:21:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 56 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 18:21:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-11-25 18:21:52,275 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 71 [2022-11-25 18:21:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:21:52,275 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-11-25 18:21:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-25 18:21:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-11-25 18:21:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 18:21:52,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:21:52,277 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:52,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:52,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:21:52,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:21:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2109273946, now seen corresponding path program 2 times [2022-11-25 18:21:52,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:52,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952495649] [2022-11-25 18:21:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:52,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:21:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429663367] [2022-11-25 18:21:52,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:21:52,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:52,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:52,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0072cd59-02c2-4a3e-b7a4-0575b53e58f0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:21:52,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:21:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:21:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 18:21:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:23:20,096 WARN L233 SmtUtils]: Spent 1.39m on a formula simplification. DAG size of input: 13258 DAG size of output: 9819 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)