./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro --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 e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 --- 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-8393723 [2022-11-18 18:24:25,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:24:25,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:24:25,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:24:25,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:24:25,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:24:25,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:24:25,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:24:25,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:24:25,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:24:25,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:24:25,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:24:25,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:24:25,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:24:25,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:24:25,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:24:25,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:24:25,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:24:25,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:24:25,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:24:25,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:24:25,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:24:25,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:24:25,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:24:25,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:24:25,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:24:25,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:24:25,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:24:25,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:24:25,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:24:25,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:24:25,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:24:25,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:24:25,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:24:25,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:24:25,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:24:25,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:24:25,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:24:25,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:24:25,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:24:25,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:24:25,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:24:25,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:24:25,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:24:25,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:24:25,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:24:25,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:24:25,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:24:25,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:24:25,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:24:25,898 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:24:25,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:24:25,899 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:24:25,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:24:25,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:24:25,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:24:25,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:24:25,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:24:25,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:24:25,901 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:24:25,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:24:25,901 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:24:25,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:24:25,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:24:25,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:24:25,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:24:25,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:24:25,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:24:25,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:24:25,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:24:25,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:24:25,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:24:25,904 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:24:25,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:24:25,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:24:25,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 [2022-11-18 18:24:26,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:24:26,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:24:26,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:24:26,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:24:26,318 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:24:26,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2022-11-18 18:24:26,403 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/data/c2f4aa55a/11c38354ab824bd595046f0471bc1439/FLAGae805b77c [2022-11-18 18:24:26,938 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:24:26,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2022-11-18 18:24:26,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/data/c2f4aa55a/11c38354ab824bd595046f0471bc1439/FLAGae805b77c [2022-11-18 18:24:27,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/data/c2f4aa55a/11c38354ab824bd595046f0471bc1439 [2022-11-18 18:24:27,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:24:27,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:24:27,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:24:27,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:24:27,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:24:27,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642d2b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27, skipping insertion in model container [2022-11-18 18:24:27,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:24:27,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:24:27,556 WARN L234 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_4529737f-ee90-4120-a8da-cf83ebf414c2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2022-11-18 18:24:27,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:24:27,606 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:24:27,619 WARN L234 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_4529737f-ee90-4120-a8da-cf83ebf414c2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2022-11-18 18:24:27,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:24:27,640 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:24:27,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27 WrapperNode [2022-11-18 18:24:27,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:24:27,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:24:27,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:24:27,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:24:27,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,686 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-11-18 18:24:27,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:24:27,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:24:27,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:24:27,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:24:27,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,718 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:24:27,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:24:27,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:24:27,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:24:27,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (1/1) ... [2022-11-18 18:24:27,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:24:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:27,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:24:27,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:24:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:24:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:24:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:24:27,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:24:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:24:27,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:24:27,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:24:27,908 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:24:28,144 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:24:28,151 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:24:28,151 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:24:28,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:24:28 BoogieIcfgContainer [2022-11-18 18:24:28,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:24:28,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:24:28,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:24:28,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:24:28,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:24:27" (1/3) ... [2022-11-18 18:24:28,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f960c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:24:28, skipping insertion in model container [2022-11-18 18:24:28,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:24:27" (2/3) ... [2022-11-18 18:24:28,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f960c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:24:28, skipping insertion in model container [2022-11-18 18:24:28,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:24:28" (3/3) ... [2022-11-18 18:24:28,163 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.c [2022-11-18 18:24:28,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:24:28,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:24:28,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:24:28,315 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;@36974799, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:24:28,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:24:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 18:24:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:24:28,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:28,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:28,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:28,363 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-11-18 18:24:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:28,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144857431] [2022-11-18 18:24:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:24:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144857431] [2022-11-18 18:24:28,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 18:24:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5142302] [2022-11-18 18:24:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:28,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:28,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:28,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:24:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 18:24:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:28,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:24:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5142302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:24:28,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:24:28,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:24:28,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705310543] [2022-11-18 18:24:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:24:28,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:24:28,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:24:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:24:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:24:28,777 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:24:28,812 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-11-18 18:24:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:24:28,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:24:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:24:28,830 INFO L225 Difference]: With dead ends: 37 [2022-11-18 18:24:28,830 INFO L226 Difference]: Without dead ends: 16 [2022-11-18 18:24:28,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:24:28,843 INFO L413 NwaCegarLoop]: 23 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, 23 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 [2022-11-18 18:24:28,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:24:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-18 18:24:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-18 18:24:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:24:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-18 18:24:28,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-18 18:24:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:24:28,885 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-18 18:24:28,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-18 18:24:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:24:28,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:28,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:28,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:24:29,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 18:24:29,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-11-18 18:24:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608716351] [2022-11-18 18:24:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:29,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:24:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608716351] [2022-11-18 18:24:29,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 18:24:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369925117] [2022-11-18 18:24:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:29,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:29,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:24:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:24:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:29,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:24:29,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369925117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:24:29,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:24:29,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:24:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471502496] [2022-11-18 18:24:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:24:29,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:24:29,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:24:29,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:24:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:24:29,347 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:24:29,381 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-18 18:24:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:24:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:24:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:24:29,408 INFO L225 Difference]: With dead ends: 26 [2022-11-18 18:24:29,408 INFO L226 Difference]: Without dead ends: 18 [2022-11-18 18:24:29,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:24:29,410 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:24:29,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:24:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-18 18:24:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-18 18:24:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:24:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-18 18:24:29,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-11-18 18:24:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:24:29,419 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-18 18:24:29,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-18 18:24:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:24:29,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:29,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:29,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:24:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-18 18:24:29,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-11-18 18:24:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345610068] [2022-11-18 18:24:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:29,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:29,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:24:29,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116509198] [2022-11-18 18:24:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:29,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:29,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:29,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:24:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:24:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:29,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:24:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:24:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345610068] [2022-11-18 18:24:29,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:24:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116509198] [2022-11-18 18:24:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116509198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:24:29,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:24:29,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:24:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151741965] [2022-11-18 18:24:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:24:29,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:24:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:24:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:24:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:24:29,904 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:24:30,015 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-18 18:24:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:24:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:24:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:24:30,017 INFO L225 Difference]: With dead ends: 28 [2022-11-18 18:24:30,017 INFO L226 Difference]: Without dead ends: 24 [2022-11-18 18:24:30,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:24:30,019 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:24:30,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:24:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-18 18:24:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-18 18:24:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 18:24:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-18 18:24:30,030 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-11-18 18:24:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:24:30,031 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-18 18:24:30,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:24:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-18 18:24:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:24:30,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:30,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:30,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:24:30,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:30,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:30,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-11-18 18:24:30,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:30,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642988771] [2022-11-18 18:24:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:30,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:30,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:24:30,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440698342] [2022-11-18 18:24:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:30,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:30,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:30,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:30,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:24:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:24:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:24:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:30,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:24:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642988771] [2022-11-18 18:24:30,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:24:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440698342] [2022-11-18 18:24:30,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440698342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:24:30,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:24:30,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-18 18:24:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728502835] [2022-11-18 18:24:30,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:24:30,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:24:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:24:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:24:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:24:30,453 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:24:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:24:30,571 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-18 18:24:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:24:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-18 18:24:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:24:30,573 INFO L225 Difference]: With dead ends: 58 [2022-11-18 18:24:30,573 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 18:24:30,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:24:30,575 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:24:30,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 96 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:24:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 18:24:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-18 18:24:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:24:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-18 18:24:30,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-11-18 18:24:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:24:30,587 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-18 18:24:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 18:24:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-18 18:24:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:24:30,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:30,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:30,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:24:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:30,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-11-18 18:24:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:30,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735742368] [2022-11-18 18:24:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:30,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:24:30,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117913303] [2022-11-18 18:24:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:30,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:30,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:24:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:24:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:24:31,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:24:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:24:31,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:24:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735742368] [2022-11-18 18:24:31,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:24:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117913303] [2022-11-18 18:24:31,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117913303] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:24:31,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:24:31,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-18 18:24:31,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031874030] [2022-11-18 18:24:31,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:24:31,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:24:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:24:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:24:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:24:31,194 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 18:24:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:24:31,262 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-18 18:24:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:24:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-18 18:24:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:24:31,264 INFO L225 Difference]: With dead ends: 60 [2022-11-18 18:24:31,264 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 18:24:31,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:24:31,266 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:24:31,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:24:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 18:24:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-18 18:24:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:24:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-18 18:24:31,302 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-11-18 18:24:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:24:31,303 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-18 18:24:31,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 18:24:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-18 18:24:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 18:24:31,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:24:31,305 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:24:31,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:24:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:31,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:24:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:24:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-11-18 18:24:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:24:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786451775] [2022-11-18 18:24:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:24:31,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:24:31,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130395998] [2022-11-18 18:24:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:24:31,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:24:31,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:24:31,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:24:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:24:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:24:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 18:24:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:24:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:24:31,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:24:36,197 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:24:56,335 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2022-11-18 18:25:14,478 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 18:25:18,514 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:25:28,621 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:25:30,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:30,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786451775] [2022-11-18 18:25:30,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:30,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130395998] [2022-11-18 18:25:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130395998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:25:30,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:25:30,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-18 18:25:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417323723] [2022-11-18 18:25:30,665 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:30,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:25:30,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:25:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=92, Unknown=5, NotChecked=110, Total=240 [2022-11-18 18:25:30,672 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 18:25:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:30,895 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-18 18:25:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:25:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-18 18:25:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:30,898 INFO L225 Difference]: With dead ends: 51 [2022-11-18 18:25:30,898 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 18:25:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=51, Invalid=146, Unknown=5, NotChecked=140, Total=342 [2022-11-18 18:25:30,899 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:30,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:25:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 18:25:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-18 18:25:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 18:25:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-18 18:25:30,924 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-11-18 18:25:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:30,926 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-18 18:25:30,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 18:25:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-18 18:25:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 18:25:30,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:30,931 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:30,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:31,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:25:31,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-11-18 18:25:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:31,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335728339] [2022-11-18 18:25:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:31,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811735420] [2022-11-18 18:25:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:25:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:31,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:25:31,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:25:31,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:25:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:25:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:25:31,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:25:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:25:31,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335728339] [2022-11-18 18:25:31,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811735420] [2022-11-18 18:25:31,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811735420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:25:31,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:25:31,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-18 18:25:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440871000] [2022-11-18 18:25:31,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:31,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:25:31,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:25:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:25:31,795 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:25:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:32,764 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-11-18 18:25:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:25:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2022-11-18 18:25:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:32,766 INFO L225 Difference]: With dead ends: 62 [2022-11-18 18:25:32,766 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 18:25:32,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:25:32,767 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:32,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 187 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:25:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 18:25:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-11-18 18:25:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:25:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-18 18:25:32,786 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2022-11-18 18:25:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:32,786 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-18 18:25:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:25:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-18 18:25:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 18:25:32,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:32,788 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:32,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:32,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:32,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:32,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2022-11-18 18:25:32,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:32,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440493232] [2022-11-18 18:25:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:33,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:33,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:33,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545937346] [2022-11-18 18:25:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:33,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:33,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:33,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:25:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:25:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:25:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:25:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:25:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 18:25:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440493232] [2022-11-18 18:25:33,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545937346] [2022-11-18 18:25:33,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545937346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:25:33,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:25:33,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-18 18:25:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215940630] [2022-11-18 18:25:33,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:33,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:25:33,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:25:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:25:33,342 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-18 18:25:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:33,667 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-18 18:25:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:25:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2022-11-18 18:25:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:33,669 INFO L225 Difference]: With dead ends: 126 [2022-11-18 18:25:33,669 INFO L226 Difference]: Without dead ends: 116 [2022-11-18 18:25:33,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:25:33,670 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:33,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 122 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:25:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-18 18:25:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2022-11-18 18:25:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 18:25:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-11-18 18:25:33,708 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2022-11-18 18:25:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:33,709 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-11-18 18:25:33,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-18 18:25:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-11-18 18:25:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 18:25:33,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:33,720 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:33,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:25:33,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2022-11-18 18:25:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131358274] [2022-11-18 18:25:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:33,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242964250] [2022-11-18 18:25:33,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:25:33,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:33,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:33,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:25:54,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:25:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:25:54,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 18:25:54,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 18:25:54,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:25:54,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131358274] [2022-11-18 18:25:54,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242964250] [2022-11-18 18:25:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242964250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:25:54,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:25:54,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-18 18:25:54,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381197453] [2022-11-18 18:25:54,706 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:25:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:25:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:25:54,708 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:25:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:55,146 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-11-18 18:25:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:25:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-11-18 18:25:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:55,147 INFO L225 Difference]: With dead ends: 101 [2022-11-18 18:25:55,148 INFO L226 Difference]: Without dead ends: 95 [2022-11-18 18:25:55,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:25:55,149 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:55,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 215 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:25:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-18 18:25:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-18 18:25:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 18:25:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-11-18 18:25:55,178 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2022-11-18 18:25:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:55,178 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-11-18 18:25:55,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:25:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-11-18 18:25:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 18:25:55,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:55,180 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:55,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:55,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:55,396 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 4 times [2022-11-18 18:25:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382734861] [2022-11-18 18:25:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:55,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:55,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:55,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633638266] [2022-11-18 18:25:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:25:55,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:55,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:55,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:55,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:25:55,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:25:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:25:55,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 18:25:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-18 18:25:55,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:25:56,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:56,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382734861] [2022-11-18 18:25:56,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:56,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633638266] [2022-11-18 18:25:56,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633638266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:25:56,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:25:56,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-18 18:25:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006065384] [2022-11-18 18:25:56,186 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:56,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:25:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:25:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:25:56,188 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:25:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:56,560 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-11-18 18:25:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:25:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-11-18 18:25:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:56,561 INFO L225 Difference]: With dead ends: 100 [2022-11-18 18:25:56,562 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:25:56,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:25:56,563 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:56,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:25:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:25:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 18:25:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 18:25:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-11-18 18:25:56,590 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2022-11-18 18:25:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:56,590 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-11-18 18:25:56,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:25:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-11-18 18:25:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 18:25:56,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:56,592 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:56,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:56,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:25:56,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 5 times [2022-11-18 18:25:56,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291048330] [2022-11-18 18:25:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:56,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:56,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148447325] [2022-11-18 18:25:56,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:25:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:56,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:56,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:26:25,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 18:26:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:26:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:26:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 18:26:26,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:30,330 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:26:50,672 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 10)) 30) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|))))) is different from true [2022-11-18 18:27:08,778 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 10)) 30) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 18:27:12,796 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:27:22,930 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:27:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291048330] [2022-11-18 18:27:24,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:27:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148447325] [2022-11-18 18:27:24,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148447325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:24,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:27:24,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-18 18:27:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303123703] [2022-11-18 18:27:24,962 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 18:27:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 18:27:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=242, Unknown=5, NotChecked=170, Total=462 [2022-11-18 18:27:24,963 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 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) [2022-11-18 18:27:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:27:25,551 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-11-18 18:27:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:27:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 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) Word has length 77 [2022-11-18 18:27:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:27:25,553 INFO L225 Difference]: With dead ends: 99 [2022-11-18 18:27:25,553 INFO L226 Difference]: Without dead ends: 93 [2022-11-18 18:27:25,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=63, Invalid=332, Unknown=5, NotChecked=200, Total=600 [2022-11-18 18:27:25,555 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:27:25,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 305 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:27:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-18 18:27:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-18 18:27:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 18:27:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-11-18 18:27:25,579 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2022-11-18 18:27:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:27:25,580 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-11-18 18:27:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 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) [2022-11-18 18:27:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-11-18 18:27:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 18:27:25,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:27:25,581 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:25,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 18:27:25,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:25,806 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:27:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 6 times [2022-11-18 18:27:25,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:25,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120949093] [2022-11-18 18:27:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:25,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:27:25,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111131264] [2022-11-18 18:27:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:27:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:25,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:25,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:36:26,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 18:36:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 18:36:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 25 proven. 166 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 18:36:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:27,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:27,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120949093] [2022-11-18 18:36:27,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:36:27,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111131264] [2022-11-18 18:36:27,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111131264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:27,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:36:27,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-18 18:36:27,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359113579] [2022-11-18 18:36:27,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:36:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:36:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:36:27,417 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 18:36:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:28,006 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-11-18 18:36:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:36:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-11-18 18:36:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:28,007 INFO L225 Difference]: With dead ends: 98 [2022-11-18 18:36:28,008 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 18:36:28,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:36:28,009 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:28,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 356 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:36:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 18:36:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-18 18:36:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 18:36:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-11-18 18:36:28,030 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2022-11-18 18:36:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:28,032 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-11-18 18:36:28,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 18:36:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-11-18 18:36:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 18:36:28,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:28,034 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:28,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:28,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:36:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 7 times [2022-11-18 18:36:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169518108] [2022-11-18 18:36:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:28,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:28,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:36:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647618930] [2022-11-18 18:36:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:36:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:28,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:28,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:37:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 18:37:39,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 51 proven. 181 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 18:37:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:44,347 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:38:05,099 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 15)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-11-18 18:38:23,159 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 15)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 18:38:27,180 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:38:37,258 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 18:38:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169518108] [2022-11-18 18:38:39,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:38:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647618930] [2022-11-18 18:38:39,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647618930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:39,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:38:39,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-18 18:38:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657339991] [2022-11-18 18:38:39,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:39,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:38:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:38:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=308, Unknown=5, NotChecked=190, Total=552 [2022-11-18 18:38:39,292 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 18:38:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:39,921 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-11-18 18:38:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:38:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-11-18 18:38:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:39,923 INFO L225 Difference]: With dead ends: 100 [2022-11-18 18:38:39,923 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:38:39,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=67, Invalid=410, Unknown=5, NotChecked=220, Total=702 [2022-11-18 18:38:39,941 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:39,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 411 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:38:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:38:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 18:38:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 18:38:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-11-18 18:38:39,961 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2022-11-18 18:38:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:39,962 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-11-18 18:38:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 18:38:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-11-18 18:38:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 18:38:39,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:39,963 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:39,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:40,182 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:40,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2022-11-18 18:38:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:40,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012636299] [2022-11-18 18:38:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:40,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:38:40,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391467539] [2022-11-18 18:38:40,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:38:40,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:40,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:40,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:38:40,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:38:40,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 18:38:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:38:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-18 18:38:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012636299] [2022-11-18 18:38:40,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:38:40,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391467539] [2022-11-18 18:38:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391467539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:40,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:38:40,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-11-18 18:38:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874343774] [2022-11-18 18:38:40,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:40,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:38:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:38:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:38:40,851 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-11-18 18:38:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:41,490 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-11-18 18:38:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 18:38:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 95 [2022-11-18 18:38:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:41,493 INFO L225 Difference]: With dead ends: 236 [2022-11-18 18:38:41,493 INFO L226 Difference]: Without dead ends: 226 [2022-11-18 18:38:41,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 18:38:41,499 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 282 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:41,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 247 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:38:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-18 18:38:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 181. [2022-11-18 18:38:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 138 states have internal predecessors, (140), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-18 18:38:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 201 transitions. [2022-11-18 18:38:41,547 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 201 transitions. Word has length 95 [2022-11-18 18:38:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 201 transitions. [2022-11-18 18:38:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 20 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-11-18 18:38:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 201 transitions. [2022-11-18 18:38:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:38:41,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:41,550 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:41,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:41,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:38:41,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -939543350, now seen corresponding path program 8 times [2022-11-18 18:38:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324806048] [2022-11-18 18:38:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:41,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:38:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043367999] [2022-11-18 18:38:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:38:41,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:41,770 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:41,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:38:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:38:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 18:38:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-18 18:38:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-18 18:38:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324806048] [2022-11-18 18:38:50,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:38:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043367999] [2022-11-18 18:38:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043367999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:50,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:38:50,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2022-11-18 18:38:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070000077] [2022-11-18 18:38:50,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:50,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 18:38:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 18:38:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-11-18 18:38:50,997 INFO L87 Difference]: Start difference. First operand 181 states and 201 transitions. Second operand has 32 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 18:38:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:56,281 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-11-18 18:38:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 18:38:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 101 [2022-11-18 18:38:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:56,283 INFO L225 Difference]: With dead ends: 198 [2022-11-18 18:38:56,283 INFO L226 Difference]: Without dead ends: 182 [2022-11-18 18:38:56,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=726, Invalid=2580, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 18:38:56,285 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 234 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:56,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 633 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:38:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-18 18:38:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2022-11-18 18:38:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 24 states have call successors, (24), 21 states have call predecessors, (24), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 18:38:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 183 transitions. [2022-11-18 18:38:56,340 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 183 transitions. Word has length 101 [2022-11-18 18:38:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:56,340 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 183 transitions. [2022-11-18 18:38:56,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 18:38:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 183 transitions. [2022-11-18 18:38:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-18 18:38:56,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:56,343 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:56,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:38:56,553 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1950762127, now seen corresponding path program 3 times [2022-11-18 18:38:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849568082] [2022-11-18 18:38:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:56,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:38:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738691406] [2022-11-18 18:38:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:38:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:56,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:56,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4529737f-ee90-4120-a8da-cf83ebf414c2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process