./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8 --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 ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- 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-2329fc7 [2022-12-13 19:31:04,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:31:04,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:31:04,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:31:04,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:31:04,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:31:04,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:31:04,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:31:04,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:31:04,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:31:04,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:31:04,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:31:04,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:31:04,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:31:04,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:31:04,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:31:04,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:31:04,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:31:04,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:31:04,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:31:04,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:31:04,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:31:04,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:31:04,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:31:04,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:31:04,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:31:04,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:31:04,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:31:04,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:31:04,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:31:04,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:31:04,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:31:04,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:31:04,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:31:04,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:31:04,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:31:04,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:31:04,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:31:04,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:31:04,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:31:04,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:31:04,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:31:04,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:31:04,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:31:04,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:31:04,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:31:04,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:31:04,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:31:04,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:31:04,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:31:04,636 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:31:04,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:31:04,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:31:04,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:31:04,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:31:04,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:31:04,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:31:04,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:31:04,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:31:04,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:31:04,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:31:04,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:31:04,640 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:31:04,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:31:04,640 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:31:04,640 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2022-12-13 19:31:04,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:31:04,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:31:04,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:31:04,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:31:04,855 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:31:04,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-12-13 19:31:07,333 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:31:07,495 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:31:07,495 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-12-13 19:31:07,500 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/data/db8950ec9/640bffd6b6d748e3a52f168b05e584af/FLAGb17cdf5ec [2022-12-13 19:31:07,924 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/data/db8950ec9/640bffd6b6d748e3a52f168b05e584af [2022-12-13 19:31:07,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:31:07,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:31:07,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:31:07,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:31:07,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:31:07,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:31:07" (1/1) ... [2022-12-13 19:31:07,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6deb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:07, skipping insertion in model container [2022-12-13 19:31:07,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:31:07" (1/1) ... [2022-12-13 19:31:07,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:31:07,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:31:08,059 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2022-12-13 19:31:08,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:31:08,082 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:31:08,092 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2022-12-13 19:31:08,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:31:08,115 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:31:08,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08 WrapperNode [2022-12-13 19:31:08,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:31:08,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:31:08,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:31:08,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:31:08,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,146 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 19:31:08,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:31:08,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:31:08,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:31:08,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:31:08,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,162 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:31:08,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:31:08,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:31:08,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:31:08,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (1/1) ... [2022-12-13 19:31:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:31:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:08,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:31:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:31:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:31:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 19:31:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 19:31:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:31:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:31:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:31:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 19:31:08,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 19:31:08,286 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:31:08,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:31:08,418 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:31:08,424 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:31:08,424 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 19:31:08,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:31:08 BoogieIcfgContainer [2022-12-13 19:31:08,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:31:08,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:31:08,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:31:08,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:31:08,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:31:07" (1/3) ... [2022-12-13 19:31:08,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f225ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:31:08, skipping insertion in model container [2022-12-13 19:31:08,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:31:08" (2/3) ... [2022-12-13 19:31:08,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f225ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:31:08, skipping insertion in model container [2022-12-13 19:31:08,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:31:08" (3/3) ... [2022-12-13 19:31:08,435 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2022-12-13 19:31:08,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:31:08,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:31:08,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:31:08,510 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;@1ab21d7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:31:08,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 19:31:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 19:31:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 19:31:08,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:08,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:08,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-12-13 19:31:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:08,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582113998] [2022-12-13 19:31:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:08,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681458706] [2022-12-13 19:31:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:08,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:08,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:08,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:31:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 19:31:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:31:08,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582113998] [2022-12-13 19:31:08,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681458706] [2022-12-13 19:31:08,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681458706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:08,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:08,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:31:08,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526830146] [2022-12-13 19:31:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:31:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:31:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:31:08,734 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:31:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:08,750 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-12-13 19:31:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:31:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-12-13 19:31:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:08,756 INFO L225 Difference]: With dead ends: 61 [2022-12-13 19:31:08,757 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 19:31:08,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:31:08,761 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-12-13 19:31:08,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 19:31:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 19:31:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 19:31:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-12-13 19:31:08,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-12-13 19:31:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:08,790 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-12-13 19:31:08,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 19:31:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-12-13 19:31:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 19:31:08,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:08,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:08,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:31:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:08,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-12-13 19:31:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575788951] [2022-12-13 19:31:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:09,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:09,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244900487] [2022-12-13 19:31:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:09,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:09,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:31:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:31:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:09,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575788951] [2022-12-13 19:31:09,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244900487] [2022-12-13 19:31:09,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244900487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:09,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:09,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:31:09,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73649520] [2022-12-13 19:31:09,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:09,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:31:09,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:31:09,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:09,172 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:31:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:09,189 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-12-13 19:31:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:31:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-12-13 19:31:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:09,191 INFO L225 Difference]: With dead ends: 37 [2022-12-13 19:31:09,191 INFO L226 Difference]: Without dead ends: 30 [2022-12-13 19:31:09,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:09,192 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:09,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-13 19:31:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-13 19:31:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 19:31:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-12-13 19:31:09,199 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-12-13 19:31:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:09,201 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-12-13 19:31:09,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:31:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-12-13 19:31:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 19:31:09,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:09,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:09,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:31:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:09,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-12-13 19:31:09,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:09,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742858813] [2022-12-13 19:31:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:09,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:09,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194923512] [2022-12-13 19:31:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:09,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:09,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:09,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:31:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:31:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:31:09,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742858813] [2022-12-13 19:31:09,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194923512] [2022-12-13 19:31:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194923512] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:09,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:09,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 19:31:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802012808] [2022-12-13 19:31:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:31:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:31:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:31:09,732 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:31:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:16,232 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-12-13 19:31:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:31:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-12-13 19:31:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:16,233 INFO L225 Difference]: With dead ends: 49 [2022-12-13 19:31:16,233 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 19:31:16,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:31:16,235 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:16,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-13 19:31:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 19:31:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-12-13 19:31:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 19:31:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-12-13 19:31:16,250 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-12-13 19:31:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:16,251 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-12-13 19:31:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 19:31:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-12-13 19:31:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 19:31:16,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:16,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:16,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:31:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:16,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-12-13 19:31:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478647548] [2022-12-13 19:31:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:16,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460803539] [2022-12-13 19:31:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:16,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:16,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:16,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:16,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:31:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:31:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:16,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478647548] [2022-12-13 19:31:16,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460803539] [2022-12-13 19:31:16,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460803539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:16,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:16,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-12-13 19:31:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516688539] [2022-12-13 19:31:16,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:16,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:31:16,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:31:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:31:16,710 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 19:31:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:16,906 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-12-13 19:31:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:31:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-12-13 19:31:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:16,908 INFO L225 Difference]: With dead ends: 53 [2022-12-13 19:31:16,908 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 19:31:16,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:31:16,909 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:16,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:31:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 19:31:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-12-13 19:31:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 19:31:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-12-13 19:31:16,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-12-13 19:31:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:16,927 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-12-13 19:31:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 19:31:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-12-13 19:31:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 19:31:16,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:16,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:16,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:31:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:17,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-12-13 19:31:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580560759] [2022-12-13 19:31:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:17,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:17,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320918097] [2022-12-13 19:31:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:17,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:17,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:17,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:31:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:31:17,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:17,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580560759] [2022-12-13 19:31:17,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320918097] [2022-12-13 19:31:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320918097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:17,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:31:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823895233] [2022-12-13 19:31:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:31:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:31:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:31:17,342 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:31:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:17,372 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-12-13 19:31:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:31:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-12-13 19:31:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:17,373 INFO L225 Difference]: With dead ends: 61 [2022-12-13 19:31:17,374 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 19:31:17,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:31:17,375 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:17,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 19:31:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-13 19:31:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 19:31:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-12-13 19:31:17,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-12-13 19:31:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:17,391 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-12-13 19:31:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:31:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-12-13 19:31:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 19:31:17,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:17,392 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:17,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:31:17,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:17,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-12-13 19:31:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614554039] [2022-12-13 19:31:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:17,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812121806] [2022-12-13 19:31:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:17,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:17,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:31:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:31:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:17,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:31:17,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614554039] [2022-12-13 19:31:17,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812121806] [2022-12-13 19:31:17,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812121806] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:31:17,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:31:17,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-12-13 19:31:17,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619491810] [2022-12-13 19:31:17,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:17,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:31:17,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:17,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:31:17,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:31:17,730 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:31:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:17,767 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-12-13 19:31:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:31:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-12-13 19:31:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:17,768 INFO L225 Difference]: With dead ends: 70 [2022-12-13 19:31:17,768 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 19:31:17,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:31:17,769 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:17,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 19:31:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-12-13 19:31:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-12-13 19:31:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-13 19:31:17,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-12-13 19:31:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:17,780 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-13 19:31:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 19:31:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-13 19:31:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 19:31:17,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:17,781 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:17,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:31:17,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 19:31:17,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-12-13 19:31:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:17,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343575437] [2022-12-13 19:31:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:17,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97004173] [2022-12-13 19:31:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:17,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:17,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:17,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:17,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:31:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:31:18,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:18,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:31:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:18,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343575437] [2022-12-13 19:31:18,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:18,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97004173] [2022-12-13 19:31:18,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97004173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:18,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-12-13 19:31:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393785143] [2022-12-13 19:31:18,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:18,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:31:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:31:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:31:18,131 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 19:31:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:18,260 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-12-13 19:31:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:31:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-12-13 19:31:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:18,261 INFO L225 Difference]: With dead ends: 125 [2022-12-13 19:31:18,261 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 19:31:18,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:31:18,262 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:18,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 215 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:31:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 19:31:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-12-13 19:31:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 19:31:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-12-13 19:31:18,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-12-13 19:31:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:18,284 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-12-13 19:31:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 19:31:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-12-13 19:31:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 19:31:18,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:18,285 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:18,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:31:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 19:31:18,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-12-13 19:31:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867224199] [2022-12-13 19:31:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:18,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691369472] [2022-12-13 19:31:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:18,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:18,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:31:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:31:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:31:18,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:18,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867224199] [2022-12-13 19:31:18,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691369472] [2022-12-13 19:31:18,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691369472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:18,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:18,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:31:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130057574] [2022-12-13 19:31:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:18,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:31:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:31:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:18,676 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:31:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:18,745 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-12-13 19:31:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:31:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-12-13 19:31:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:18,748 INFO L225 Difference]: With dead ends: 154 [2022-12-13 19:31:18,748 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 19:31:18,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:18,750 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:18,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 19:31:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-12-13 19:31:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-13 19:31:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-12-13 19:31:18,784 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-12-13 19:31:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:18,784 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-12-13 19:31:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:31:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-12-13 19:31:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 19:31:18,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:18,785 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:18,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:31:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:18,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-12-13 19:31:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:18,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773699218] [2022-12-13 19:31:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:18,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:18,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259400223] [2022-12-13 19:31:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:18,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:19,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:19,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:31:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:31:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:19,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:31:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773699218] [2022-12-13 19:31:19,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259400223] [2022-12-13 19:31:19,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259400223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:19,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:19,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-12-13 19:31:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126174961] [2022-12-13 19:31:19,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:19,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:31:19,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:31:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:31:19,222 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 19:31:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:19,399 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-12-13 19:31:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:31:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-12-13 19:31:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:19,401 INFO L225 Difference]: With dead ends: 215 [2022-12-13 19:31:19,401 INFO L226 Difference]: Without dead ends: 168 [2022-12-13 19:31:19,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:31:19,402 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:19,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:31:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-13 19:31:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-12-13 19:31:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-13 19:31:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-12-13 19:31:19,447 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-12-13 19:31:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:19,447 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-12-13 19:31:19,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 19:31:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-12-13 19:31:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 19:31:19,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:19,448 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:19,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:31:19,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:31:19,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-12-13 19:31:19,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:19,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143451144] [2022-12-13 19:31:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:19,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:19,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165364466] [2022-12-13 19:31:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:19,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:19,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:19,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:31:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:31:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:19,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 19:31:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143451144] [2022-12-13 19:31:19,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165364466] [2022-12-13 19:31:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165364466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:19,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:19,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-13 19:31:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463967002] [2022-12-13 19:31:19,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:31:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:31:19,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:31:19,838 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 19:31:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:20,063 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-12-13 19:31:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:31:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-12-13 19:31:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:20,065 INFO L225 Difference]: With dead ends: 207 [2022-12-13 19:31:20,065 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 19:31:20,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:31:20,066 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:20,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 234 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:31:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 19:31:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-12-13 19:31:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-13 19:31:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-12-13 19:31:20,101 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-12-13 19:31:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:20,101 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-12-13 19:31:20,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 19:31:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-12-13 19:31:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 19:31:20,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:20,103 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:20,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:31:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:20,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-12-13 19:31:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548505669] [2022-12-13 19:31:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:20,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:20,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:20,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793005387] [2022-12-13 19:31:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:20,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:20,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:20,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:20,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:31:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:20,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:31:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-13 19:31:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-13 19:31:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548505669] [2022-12-13 19:31:20,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:20,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793005387] [2022-12-13 19:31:20,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793005387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:20,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:20,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-12-13 19:31:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847847797] [2022-12-13 19:31:20,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:31:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:20,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:31:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:20,546 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:31:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:20,669 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-12-13 19:31:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:31:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-12-13 19:31:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:20,672 INFO L225 Difference]: With dead ends: 498 [2022-12-13 19:31:20,672 INFO L226 Difference]: Without dead ends: 355 [2022-12-13 19:31:20,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:31:20,674 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:20,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-12-13 19:31:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-12-13 19:31:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-12-13 19:31:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-12-13 19:31:20,738 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-12-13 19:31:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:20,738 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-12-13 19:31:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:31:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-12-13 19:31:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 19:31:20,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:20,741 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:20,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:31:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:20,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-12-13 19:31:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9002163] [2022-12-13 19:31:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:20,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693409448] [2022-12-13 19:31:20,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:31:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:20,977 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:20,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:31:21,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:31:21,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:31:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:31:21,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-12-13 19:31:21,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9002163] [2022-12-13 19:31:21,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693409448] [2022-12-13 19:31:21,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693409448] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:21,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:21,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-12-13 19:31:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321383519] [2022-12-13 19:31:21,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:31:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:31:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:31:21,285 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-12-13 19:31:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:21,748 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2022-12-13 19:31:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 19:31:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2022-12-13 19:31:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:21,752 INFO L225 Difference]: With dead ends: 981 [2022-12-13 19:31:21,752 INFO L226 Difference]: Without dead ends: 838 [2022-12-13 19:31:21,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 19:31:21,754 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 250 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 361 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:31:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-12-13 19:31:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2022-12-13 19:31:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2022-12-13 19:31:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2022-12-13 19:31:21,903 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2022-12-13 19:31:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:21,903 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2022-12-13 19:31:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-12-13 19:31:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2022-12-13 19:31:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 19:31:21,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:21,906 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:21,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:31:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 19:31:22,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-12-13 19:31:22,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817544946] [2022-12-13 19:31:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:22,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:22,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270513060] [2022-12-13 19:31:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:22,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:22,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:22,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:31:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:31:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:22,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-13 19:31:22,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:22,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817544946] [2022-12-13 19:31:22,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270513060] [2022-12-13 19:31:22,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270513060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:22,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:22,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-12-13 19:31:22,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034820397] [2022-12-13 19:31:22,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:31:22,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:31:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:31:22,535 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-12-13 19:31:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:23,169 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2022-12-13 19:31:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 19:31:23,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2022-12-13 19:31:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:23,172 INFO L225 Difference]: With dead ends: 1281 [2022-12-13 19:31:23,172 INFO L226 Difference]: Without dead ends: 791 [2022-12-13 19:31:23,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 19:31:23,174 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 376 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:23,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 497 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:31:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-12-13 19:31:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2022-12-13 19:31:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2022-12-13 19:31:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2022-12-13 19:31:23,290 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2022-12-13 19:31:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:23,291 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2022-12-13 19:31:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-12-13 19:31:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2022-12-13 19:31:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-13 19:31:23,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:23,292 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:23,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:31:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 19:31:23,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-12-13 19:31:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978515277] [2022-12-13 19:31:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:23,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:23,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496395828] [2022-12-13 19:31:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:23,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:23,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:23,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:31:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 19:31:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:23,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-12-13 19:31:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978515277] [2022-12-13 19:31:23,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496395828] [2022-12-13 19:31:23,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496395828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:23,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:23,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-12-13 19:31:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365746191] [2022-12-13 19:31:23,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:23,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 19:31:23,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 19:31:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:31:23,864 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-12-13 19:31:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:24,575 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2022-12-13 19:31:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 19:31:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2022-12-13 19:31:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:24,579 INFO L225 Difference]: With dead ends: 846 [2022-12-13 19:31:24,579 INFO L226 Difference]: Without dead ends: 841 [2022-12-13 19:31:24,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 19:31:24,581 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 370 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:24,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 518 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:31:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-12-13 19:31:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2022-12-13 19:31:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-12-13 19:31:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2022-12-13 19:31:24,773 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2022-12-13 19:31:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:24,773 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2022-12-13 19:31:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-12-13 19:31:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2022-12-13 19:31:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-13 19:31:24,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:24,776 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:24,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 19:31:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:31:24,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2022-12-13 19:31:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55841127] [2022-12-13 19:31:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:24,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393035655] [2022-12-13 19:31:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:31:24,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:24,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:24,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:31:25,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:31:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:31:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-12-13 19:31:25,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:25,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55841127] [2022-12-13 19:31:25,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393035655] [2022-12-13 19:31:25,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393035655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:25,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:25,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:31:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373684632] [2022-12-13 19:31:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:31:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:31:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:31:25,112 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:31:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:25,274 INFO L93 Difference]: Finished difference Result 1099 states and 1478 transitions. [2022-12-13 19:31:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:31:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 177 [2022-12-13 19:31:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:25,278 INFO L225 Difference]: With dead ends: 1099 [2022-12-13 19:31:25,278 INFO L226 Difference]: Without dead ends: 892 [2022-12-13 19:31:25,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:31:25,282 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:25,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-12-13 19:31:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 857. [2022-12-13 19:31:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 644 states have (on average 1.1770186335403727) internal successors, (758), 651 states have internal predecessors, (758), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2022-12-13 19:31:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1125 transitions. [2022-12-13 19:31:25,415 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1125 transitions. Word has length 177 [2022-12-13 19:31:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:25,415 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1125 transitions. [2022-12-13 19:31:25,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:31:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1125 transitions. [2022-12-13 19:31:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:25,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:25,418 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:25,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:31:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:25,619 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1858915778, now seen corresponding path program 4 times [2022-12-13 19:31:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175602920] [2022-12-13 19:31:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:25,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346859272] [2022-12-13 19:31:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:31:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:25,628 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:25,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:31:25,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:31:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 19:31:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-12-13 19:31:25,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175602920] [2022-12-13 19:31:25,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346859272] [2022-12-13 19:31:25,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346859272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:25,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:25,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:31:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980044214] [2022-12-13 19:31:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:25,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:31:25,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:31:25,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:31:25,719 INFO L87 Difference]: Start difference. First operand 857 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-13 19:31:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:25,891 INFO L93 Difference]: Finished difference Result 1458 states and 1913 transitions. [2022-12-13 19:31:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:31:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2022-12-13 19:31:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:25,894 INFO L225 Difference]: With dead ends: 1458 [2022-12-13 19:31:25,894 INFO L226 Difference]: Without dead ends: 915 [2022-12-13 19:31:25,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:31:25,896 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:25,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-12-13 19:31:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 863. [2022-12-13 19:31:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 650 states have (on average 1.1753846153846155) internal successors, (764), 659 states have internal predecessors, (764), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2022-12-13 19:31:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1131 transitions. [2022-12-13 19:31:26,054 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1131 transitions. Word has length 183 [2022-12-13 19:31:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:26,055 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1131 transitions. [2022-12-13 19:31:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-13 19:31:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1131 transitions. [2022-12-13 19:31:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:26,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:26,057 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:26,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 19:31:26,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:31:26,258 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1116662802, now seen corresponding path program 5 times [2022-12-13 19:31:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400730944] [2022-12-13 19:31:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:26,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300173182] [2022-12-13 19:31:26,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:31:26,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:26,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:26,271 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:26,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:31:26,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 19:31:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:31:26,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-12-13 19:31:26,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:26,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400730944] [2022-12-13 19:31:26,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:26,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300173182] [2022-12-13 19:31:26,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300173182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:26,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:26,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:31:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774643093] [2022-12-13 19:31:26,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:26,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:31:26,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:31:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:31:26,397 INFO L87 Difference]: Start difference. First operand 863 states and 1131 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 19:31:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:26,559 INFO L93 Difference]: Finished difference Result 883 states and 1150 transitions. [2022-12-13 19:31:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:31:26,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 183 [2022-12-13 19:31:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:26,563 INFO L225 Difference]: With dead ends: 883 [2022-12-13 19:31:26,563 INFO L226 Difference]: Without dead ends: 827 [2022-12-13 19:31:26,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:31:26,564 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:26,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-12-13 19:31:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 802. [2022-12-13 19:31:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 603 states have (on average 1.1691542288557213) internal successors, (705), 611 states have internal predecessors, (705), 175 states have call successors, (175), 24 states have call predecessors, (175), 23 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2022-12-13 19:31:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1054 transitions. [2022-12-13 19:31:26,693 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1054 transitions. Word has length 183 [2022-12-13 19:31:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:26,693 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1054 transitions. [2022-12-13 19:31:26,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 19:31:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1054 transitions. [2022-12-13 19:31:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:26,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:26,696 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:26,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:31:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:31:26,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 6 times [2022-12-13 19:31:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770804202] [2022-12-13 19:31:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:26,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757428127] [2022-12-13 19:31:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:31:26,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:26,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:26,915 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:26,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:31:27,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 19:31:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:27,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:31:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-12-13 19:31:27,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:31:27,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770804202] [2022-12-13 19:31:27,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757428127] [2022-12-13 19:31:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757428127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:31:27,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:31:27,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:31:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919075980] [2022-12-13 19:31:27,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:31:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:31:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:31:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:27,547 INFO L87 Difference]: Start difference. First operand 802 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:31:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:27,683 INFO L93 Difference]: Finished difference Result 849 states and 1103 transitions. [2022-12-13 19:31:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:31:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2022-12-13 19:31:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:27,685 INFO L225 Difference]: With dead ends: 849 [2022-12-13 19:31:27,685 INFO L226 Difference]: Without dead ends: 778 [2022-12-13 19:31:27,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:31:27,686 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:27,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:31:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-12-13 19:31:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 751. [2022-12-13 19:31:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 572 states have internal predecessors, (657), 162 states have call successors, (162), 24 states have call predecessors, (162), 23 states have return successors, (161), 154 states have call predecessors, (161), 161 states have call successors, (161) [2022-12-13 19:31:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 980 transitions. [2022-12-13 19:31:27,838 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 980 transitions. Word has length 183 [2022-12-13 19:31:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:27,838 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 980 transitions. [2022-12-13 19:31:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:31:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 980 transitions. [2022-12-13 19:31:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:27,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:27,840 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:27,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:31:28,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:31:28,041 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 7 times [2022-12-13 19:31:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729075035] [2022-12-13 19:31:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:28,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:28,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506557408] [2022-12-13 19:31:28,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:31:28,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:28,054 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:28,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:31:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:31:28,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-12-13 19:31:28,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-12-13 19:31:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729075035] [2022-12-13 19:31:28,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506557408] [2022-12-13 19:31:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506557408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:28,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:28,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-12-13 19:31:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530545275] [2022-12-13 19:31:28,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:31:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:31:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:31:28,338 INFO L87 Difference]: Start difference. First operand 751 states and 980 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-12-13 19:31:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:29,179 INFO L93 Difference]: Finished difference Result 1716 states and 2271 transitions. [2022-12-13 19:31:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:31:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 183 [2022-12-13 19:31:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:29,182 INFO L225 Difference]: With dead ends: 1716 [2022-12-13 19:31:29,183 INFO L226 Difference]: Without dead ends: 1519 [2022-12-13 19:31:29,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 350 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:31:29,184 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 126 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:29,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 889 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:31:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-12-13 19:31:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1310. [2022-12-13 19:31:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 985 states have (on average 1.1796954314720811) internal successors, (1162), 1001 states have internal predecessors, (1162), 301 states have call successors, (301), 24 states have call predecessors, (301), 23 states have return successors, (300), 284 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-13 19:31:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1763 transitions. [2022-12-13 19:31:29,413 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1763 transitions. Word has length 183 [2022-12-13 19:31:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:29,414 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1763 transitions. [2022-12-13 19:31:29,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-12-13 19:31:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1763 transitions. [2022-12-13 19:31:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:29,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:29,417 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:29,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 19:31:29,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:29,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 8 times [2022-12-13 19:31:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:29,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87935549] [2022-12-13 19:31:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:29,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:29,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593821326] [2022-12-13 19:31:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:31:29,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:29,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:29,632 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:29,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:31:29,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:31:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:31:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-12-13 19:31:29,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-12-13 19:31:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87935549] [2022-12-13 19:31:29,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593821326] [2022-12-13 19:31:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593821326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:29,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:29,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-13 19:31:29,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104022508] [2022-12-13 19:31:29,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:29,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:31:29,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:31:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:31:29,926 INFO L87 Difference]: Start difference. First operand 1310 states and 1763 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-12-13 19:31:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:31,178 INFO L93 Difference]: Finished difference Result 2710 states and 3671 transitions. [2022-12-13 19:31:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 19:31:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2022-12-13 19:31:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:31,184 INFO L225 Difference]: With dead ends: 2710 [2022-12-13 19:31:31,184 INFO L226 Difference]: Without dead ends: 2413 [2022-12-13 19:31:31,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 19:31:31,185 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 183 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:31,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 764 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:31:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-12-13 19:31:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1964. [2022-12-13 19:31:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1474 states have (on average 1.162822252374491) internal successors, (1714), 1502 states have internal predecessors, (1714), 466 states have call successors, (466), 24 states have call predecessors, (466), 23 states have return successors, (465), 437 states have call predecessors, (465), 465 states have call successors, (465) [2022-12-13 19:31:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2645 transitions. [2022-12-13 19:31:31,610 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2645 transitions. Word has length 183 [2022-12-13 19:31:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:31,610 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2645 transitions. [2022-12-13 19:31:31,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-12-13 19:31:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2645 transitions. [2022-12-13 19:31:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:31,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:31,614 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:31,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 19:31:31,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:31,815 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 9 times [2022-12-13 19:31:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:31,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517833418] [2022-12-13 19:31:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:31,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:31,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713045070] [2022-12-13 19:31:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:31:31,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:31,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:31,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 19:31:34,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 19:31:34,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:34,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:31:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-12-13 19:31:34,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-12-13 19:31:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517833418] [2022-12-13 19:31:34,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713045070] [2022-12-13 19:31:34,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713045070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:34,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:34,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-12-13 19:31:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988866934] [2022-12-13 19:31:34,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:34,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:31:34,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:31:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:31:34,780 INFO L87 Difference]: Start difference. First operand 1964 states and 2645 transitions. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-12-13 19:31:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:37,827 INFO L93 Difference]: Finished difference Result 3248 states and 4391 transitions. [2022-12-13 19:31:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 19:31:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) Word has length 183 [2022-12-13 19:31:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:37,833 INFO L225 Difference]: With dead ends: 3248 [2022-12-13 19:31:37,833 INFO L226 Difference]: Without dead ends: 2989 [2022-12-13 19:31:37,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 19:31:37,835 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 233 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:37,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 2273 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 19:31:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-12-13 19:31:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2458. [2022-12-13 19:31:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1844 states have (on average 1.1719088937093276) internal successors, (2161), 1886 states have internal predecessors, (2161), 590 states have call successors, (590), 24 states have call predecessors, (590), 23 states have return successors, (589), 547 states have call predecessors, (589), 589 states have call successors, (589) [2022-12-13 19:31:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3340 transitions. [2022-12-13 19:31:38,372 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3340 transitions. Word has length 183 [2022-12-13 19:31:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:38,372 INFO L495 AbstractCegarLoop]: Abstraction has 2458 states and 3340 transitions. [2022-12-13 19:31:38,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-12-13 19:31:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3340 transitions. [2022-12-13 19:31:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 19:31:38,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:38,377 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:38,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 19:31:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 19:31:38,577 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 10 times [2022-12-13 19:31:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:38,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919429213] [2022-12-13 19:31:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:38,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893704429] [2022-12-13 19:31:38,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:31:38,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:38,586 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 19:31:38,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:31:38,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:31:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:39,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-12-13 19:31:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919429213] [2022-12-13 19:31:39,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893704429] [2022-12-13 19:31:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893704429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:39,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:39,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2022-12-13 19:31:39,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764809885] [2022-12-13 19:31:39,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:39,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 19:31:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 19:31:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 19:31:39,519 INFO L87 Difference]: Start difference. First operand 2458 states and 3340 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-12-13 19:31:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:43,344 INFO L93 Difference]: Finished difference Result 9902 states and 14921 transitions. [2022-12-13 19:31:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 19:31:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2022-12-13 19:31:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:43,367 INFO L225 Difference]: With dead ends: 9902 [2022-12-13 19:31:43,368 INFO L226 Difference]: Without dead ends: 9893 [2022-12-13 19:31:43,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 19:31:43,371 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 915 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:43,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 856 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 19:31:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2022-12-13 19:31:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 9641. [2022-12-13 19:31:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 7244 states have (on average 1.2642186637217008) internal successors, (9158), 7307 states have internal predecessors, (9158), 2353 states have call successors, (2353), 44 states have call predecessors, (2353), 43 states have return successors, (2352), 2289 states have call predecessors, (2352), 2352 states have call successors, (2352) [2022-12-13 19:31:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 13863 transitions. [2022-12-13 19:31:45,763 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 13863 transitions. Word has length 183 [2022-12-13 19:31:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:45,763 INFO L495 AbstractCegarLoop]: Abstraction has 9641 states and 13863 transitions. [2022-12-13 19:31:45,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-12-13 19:31:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 13863 transitions. [2022-12-13 19:31:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-13 19:31:45,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:45,768 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:45,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 19:31:45,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:31:45,970 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2022-12-13 19:31:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:45,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824605668] [2022-12-13 19:31:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:46,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383390423] [2022-12-13 19:31:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:31:46,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:46,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:46,006 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:46,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 19:31:46,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:31:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 19:31:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:46,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-12-13 19:31:46,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824605668] [2022-12-13 19:31:46,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383390423] [2022-12-13 19:31:46,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383390423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:46,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:46,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2022-12-13 19:31:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90751099] [2022-12-13 19:31:46,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 19:31:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 19:31:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:31:46,916 INFO L87 Difference]: Start difference. First operand 9641 states and 13863 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-13 19:31:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:50,327 INFO L93 Difference]: Finished difference Result 14788 states and 21459 transitions. [2022-12-13 19:31:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-13 19:31:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2022-12-13 19:31:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:50,351 INFO L225 Difference]: With dead ends: 14788 [2022-12-13 19:31:50,351 INFO L226 Difference]: Without dead ends: 7693 [2022-12-13 19:31:50,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 19:31:50,362 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 914 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:50,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 842 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 19:31:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2022-12-13 19:31:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7466. [2022-12-13 19:31:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 5599 states have (on average 1.1821753884622255) internal successors, (6619), 5643 states have internal predecessors, (6619), 1821 states have call successors, (1821), 46 states have call predecessors, (1821), 45 states have return successors, (1820), 1776 states have call predecessors, (1820), 1820 states have call successors, (1820) [2022-12-13 19:31:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 10260 transitions. [2022-12-13 19:31:52,279 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 10260 transitions. Word has length 189 [2022-12-13 19:31:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:52,279 INFO L495 AbstractCegarLoop]: Abstraction has 7466 states and 10260 transitions. [2022-12-13 19:31:52,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-13 19:31:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 10260 transitions. [2022-12-13 19:31:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-13 19:31:52,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:52,287 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:52,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 19:31:52,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:52,488 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2022-12-13 19:31:52,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:52,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107239745] [2022-12-13 19:31:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:52,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094396214] [2022-12-13 19:31:52,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:31:52,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:52,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:52,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 19:31:52,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:31:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 19:31:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:31:52,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-12-13 19:31:53,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107239745] [2022-12-13 19:31:53,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:31:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094396214] [2022-12-13 19:31:53,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094396214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:53,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:31:53,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-12-13 19:31:53,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044538704] [2022-12-13 19:31:53,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:53,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 19:31:53,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 19:31:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 19:31:53,380 INFO L87 Difference]: Start difference. First operand 7466 states and 10260 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-12-13 19:31:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:31:56,928 INFO L93 Difference]: Finished difference Result 8072 states and 11145 transitions. [2022-12-13 19:31:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-13 19:31:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2022-12-13 19:31:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:31:56,948 INFO L225 Difference]: With dead ends: 8072 [2022-12-13 19:31:56,948 INFO L226 Difference]: Without dead ends: 7923 [2022-12-13 19:31:56,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-12-13 19:31:56,951 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 768 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:31:56,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 828 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 19:31:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2022-12-13 19:31:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7216. [2022-12-13 19:31:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7216 states, 5412 states have (on average 1.121212121212121) internal successors, (6068), 5456 states have internal predecessors, (6068), 1756 states have call successors, (1756), 48 states have call predecessors, (1756), 47 states have return successors, (1755), 1711 states have call predecessors, (1755), 1755 states have call successors, (1755) [2022-12-13 19:31:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7216 states to 7216 states and 9579 transitions. [2022-12-13 19:31:58,576 INFO L78 Accepts]: Start accepts. Automaton has 7216 states and 9579 transitions. Word has length 195 [2022-12-13 19:31:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:31:58,577 INFO L495 AbstractCegarLoop]: Abstraction has 7216 states and 9579 transitions. [2022-12-13 19:31:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-12-13 19:31:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 7216 states and 9579 transitions. [2022-12-13 19:31:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-12-13 19:31:58,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:31:58,605 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:58,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 19:31:58,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:58,805 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:31:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 11 times [2022-12-13 19:31:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:58,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582143620] [2022-12-13 19:31:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:58,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:31:58,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614128304] [2022-12-13 19:31:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:31:58,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:58,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:58,827 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:58,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 19:31:59,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 19:31:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:31:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:32:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-12-13 19:32:00,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:32:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-12-13 19:32:01,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:32:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582143620] [2022-12-13 19:32:01,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:32:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614128304] [2022-12-13 19:32:01,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614128304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:32:01,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:32:01,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-12-13 19:32:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093971754] [2022-12-13 19:32:01,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:32:01,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 19:32:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:32:01,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 19:32:01,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 19:32:01,316 INFO L87 Difference]: Start difference. First operand 7216 states and 9579 transitions. Second operand has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2022-12-13 19:32:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:32:18,790 INFO L93 Difference]: Finished difference Result 18492 states and 24840 transitions. [2022-12-13 19:32:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-12-13 19:32:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) Word has length 375 [2022-12-13 19:32:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:32:18,817 INFO L225 Difference]: With dead ends: 18492 [2022-12-13 19:32:18,817 INFO L226 Difference]: Without dead ends: 16293 [2022-12-13 19:32:18,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4365, Invalid=15375, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 19:32:18,824 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1208 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:32:18,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 4630 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 6527 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-13 19:32:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2022-12-13 19:32:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 11009. [2022-12-13 19:32:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 8256 states have (on average 1.1242732558139534) internal successors, (9282), 8337 states have internal predecessors, (9282), 2705 states have call successors, (2705), 48 states have call predecessors, (2705), 47 states have return successors, (2704), 2623 states have call predecessors, (2704), 2704 states have call successors, (2704) [2022-12-13 19:32:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 14691 transitions. [2022-12-13 19:32:22,439 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 14691 transitions. Word has length 375 [2022-12-13 19:32:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:32:22,439 INFO L495 AbstractCegarLoop]: Abstraction has 11009 states and 14691 transitions. [2022-12-13 19:32:22,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2022-12-13 19:32:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 14691 transitions. [2022-12-13 19:32:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-12-13 19:32:22,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:32:22,476 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:32:22,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 19:32:22,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:32:22,677 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:32:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:32:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2073406448, now seen corresponding path program 12 times [2022-12-13 19:32:22,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:32:22,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379446198] [2022-12-13 19:32:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:32:22,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:32:22,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:32:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704014175] [2022-12-13 19:32:22,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:32:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:32:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:32:22,689 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:32:22,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ab2c26-7ca6-48b4-8f7b-3da3dc58f3ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process