./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN --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 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:54:37,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:54:37,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:54:37,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:54:37,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:54:37,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:54:37,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:54:37,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:54:37,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:54:37,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:54:37,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:54:37,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:54:37,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:54:37,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:54:37,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:54:37,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:54:37,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:54:37,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:54:37,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:54:37,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:54:37,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:54:37,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:54:37,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:54:37,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:54:37,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:54:37,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:54:37,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:54:37,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:54:37,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:54:37,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:54:37,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:54:37,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:54:37,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:54:37,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:54:37,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:54:37,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:54:37,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:54:37,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:54:37,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:54:37,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:54:37,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:54:37,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:54:38,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:54:38,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:54:38,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:54:38,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:54:38,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:54:38,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:54:38,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:54:38,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:54:38,042 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:54:38,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:54:38,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:54:38,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:54:38,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:54:38,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:54:38,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:54:38,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:54:38,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:54:38,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:54:38,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:54:38,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:54:38,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:54:38,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:54:38,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:54:38,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:54:38,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:54:38,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:54:38,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:54:38,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:54:38,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:54:38,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:54:38,048 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:54:38,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:54:38,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:54:38,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 [2022-11-20 11:54:38,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:54:38,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:54:38,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:54:38,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:54:38,377 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:54:38,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-simple/nested_3.c [2022-11-20 11:54:41,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:54:41,661 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:54:41,661 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/sv-benchmarks/c/loop-simple/nested_3.c [2022-11-20 11:54:41,667 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/data/24db600cd/ae8b3141537b4a32ae50df0017605193/FLAGdcc11c584 [2022-11-20 11:54:41,682 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/data/24db600cd/ae8b3141537b4a32ae50df0017605193 [2022-11-20 11:54:41,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:54:41,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:54:41,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:41,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:54:41,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:54:41,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783ddeb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41, skipping insertion in model container [2022-11-20 11:54:41,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:54:41,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:54:41,865 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_135a5dae-5f12-4c3c-895a-b01fc2e110b6/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2022-11-20 11:54:41,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:41,885 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:54:41,898 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_135a5dae-5f12-4c3c-895a-b01fc2e110b6/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2022-11-20 11:54:41,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:41,912 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:54:41,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41 WrapperNode [2022-11-20 11:54:41,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:41,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:54:41,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:54:41,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:54:41,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,942 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-11-20 11:54:41,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:54:41,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:54:41,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:54:41,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:54:41,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:54:41,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:54:41,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:54:41,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:54:41,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (1/1) ... [2022-11-20 11:54:41,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:54:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:41,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:54:42,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:54:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:54:42,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:54:42,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:54:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:54:42,089 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:54:42,091 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:54:42,184 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:54:42,190 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:54:42,191 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:54:42,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:42 BoogieIcfgContainer [2022-11-20 11:54:42,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:54:42,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:54:42,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:54:42,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:54:42,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:54:41" (1/3) ... [2022-11-20 11:54:42,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e28155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:42, skipping insertion in model container [2022-11-20 11:54:42,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:41" (2/3) ... [2022-11-20 11:54:42,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e28155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:42, skipping insertion in model container [2022-11-20 11:54:42,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:42" (3/3) ... [2022-11-20 11:54:42,203 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_3.c [2022-11-20 11:54:42,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:54:42,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:54:42,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:54:42,277 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;@621027e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:54:42,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:54:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:54:42,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:42,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:54:42,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2022-11-20 11:54:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349522379] [2022-11-20 11:54:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349522379] [2022-11-20 11:54:42,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349522379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:42,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:42,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:54:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357042978] [2022-11-20 11:54:42,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:42,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:54:42,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:54:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:54:42,484 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:42,496 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-11-20 11:54:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:54:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:54:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:42,523 INFO L225 Difference]: With dead ends: 28 [2022-11-20 11:54:42,523 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 11:54:42,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:54:42,530 INFO L413 NwaCegarLoop]: 17 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, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:42,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 11:54:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-20 11:54:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-20 11:54:42,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-11-20 11:54:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:42,563 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-20 11:54:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-20 11:54:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:54:42,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:42,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:54:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:54:42,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2022-11-20 11:54:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:42,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538306463] [2022-11-20 11:54:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538306463] [2022-11-20 11:54:42,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538306463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:42,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:42,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:54:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652001102] [2022-11-20 11:54:42,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:54:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:54:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,653 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:42,686 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-20 11:54:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:54:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:54:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:42,694 INFO L225 Difference]: With dead ends: 20 [2022-11-20 11:54:42,694 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 11:54:42,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,696 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:42,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 11:54:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2022-11-20 11:54:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-20 11:54:42,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2022-11-20 11:54:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:42,708 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-20 11:54:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-20 11:54:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:54:42,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:42,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:54:42,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2022-11-20 11:54:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:42,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828585391] [2022-11-20 11:54:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828585391] [2022-11-20 11:54:42,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828585391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:42,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:42,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:54:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018110221] [2022-11-20 11:54:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:42,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:54:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:54:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,803 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:42,818 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-11-20 11:54:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:54:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:54:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:42,820 INFO L225 Difference]: With dead ends: 25 [2022-11-20 11:54:42,820 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 11:54:42,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,822 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:42,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 11:54:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-11-20 11:54:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-20 11:54:42,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-11-20 11:54:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:42,827 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-20 11:54:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-20 11:54:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:54:42,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:42,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:42,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:54:42,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2022-11-20 11:54:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:42,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852516515] [2022-11-20 11:54:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852516515] [2022-11-20 11:54:42,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852516515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:54:42,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:54:42,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:54:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737050271] [2022-11-20 11:54:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:54:42,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:54:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:54:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,890 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:42,905 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-20 11:54:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:54:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:54:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:42,907 INFO L225 Difference]: With dead ends: 25 [2022-11-20 11:54:42,907 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 11:54:42,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:54:42,915 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:42,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 11:54:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-20 11:54:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-20 11:54:42,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2022-11-20 11:54:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:42,920 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-20 11:54:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-20 11:54:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:54:42,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:42,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:42,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:54:42,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2022-11-20 11:54:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745146449] [2022-11-20 11:54:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:43,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745146449] [2022-11-20 11:54:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745146449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:43,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7195963] [2022-11-20 11:54:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:43,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:43,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:43,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:54:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:54:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7195963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:43,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:43,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:54:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999428359] [2022-11-20 11:54:43,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:43,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:54:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:54:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:54:43,308 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:43,380 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-20 11:54:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:54:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:54:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:43,382 INFO L225 Difference]: With dead ends: 31 [2022-11-20 11:54:43,382 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 11:54:43,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:54:43,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:43,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:54:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 11:54:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-20 11:54:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-20 11:54:43,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-11-20 11:54:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:43,390 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-20 11:54:43,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-20 11:54:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:54:43,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:43,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:43,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:54:43,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:43,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash -924137478, now seen corresponding path program 2 times [2022-11-20 11:54:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153247501] [2022-11-20 11:54:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:54:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153247501] [2022-11-20 11:54:43,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153247501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362650378] [2022-11-20 11:54:43,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:54:43,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:43,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:54:43,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:54:43,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:54:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362650378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:43,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:43,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-20 11:54:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482335485] [2022-11-20 11:54:43,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:43,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:54:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:54:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:54:43,922 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:44,125 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-11-20 11:54:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:54:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:54:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:44,127 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:54:44,127 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 11:54:44,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:54:44,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:44,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:54:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 11:54:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-11-20 11:54:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-20 11:54:44,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-11-20 11:54:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:44,153 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-20 11:54:44,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-20 11:54:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:54:44,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:44,157 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:54:44,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:44,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2025458834, now seen corresponding path program 3 times [2022-11-20 11:54:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463053086] [2022-11-20 11:54:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:44,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-20 11:54:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463053086] [2022-11-20 11:54:44,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463053086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698988868] [2022-11-20 11:54:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:54:44,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:44,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:44,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:54:44,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:54:44,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:54:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-20 11:54:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-20 11:54:44,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698988868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:44,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:44,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:54:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686219671] [2022-11-20 11:54:44,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:54:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:54:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:54:44,721 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:44,757 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2022-11-20 11:54:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:54:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 11:54:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:44,759 INFO L225 Difference]: With dead ends: 141 [2022-11-20 11:54:44,760 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 11:54:44,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:54:44,761 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:44,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 11:54:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-20 11:54:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.094890510948905) internal successors, (150), 137 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2022-11-20 11:54:44,797 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 38 [2022-11-20 11:54:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:44,801 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2022-11-20 11:54:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2022-11-20 11:54:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 11:54:44,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:44,809 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:54:44,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:45,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:45,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 128554662, now seen corresponding path program 4 times [2022-11-20 11:54:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813595682] [2022-11-20 11:54:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-11-20 11:54:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813595682] [2022-11-20 11:54:45,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813595682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688771546] [2022-11-20 11:54:45,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:54:45,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:45,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:45,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:54:45,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:54:45,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:54:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-11-20 11:54:45,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 1063 proven. 89 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-11-20 11:54:45,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688771546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:45,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:45,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:54:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112246365] [2022-11-20 11:54:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:45,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:54:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:54:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:54:45,585 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:45,653 INFO L93 Difference]: Finished difference Result 482 states and 535 transitions. [2022-11-20 11:54:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:54:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-20 11:54:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:45,656 INFO L225 Difference]: With dead ends: 482 [2022-11-20 11:54:45,656 INFO L226 Difference]: Without dead ends: 378 [2022-11-20 11:54:45,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:54:45,658 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:45,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-20 11:54:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-20 11:54:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0769230769230769) internal successors, (406), 377 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 406 transitions. [2022-11-20 11:54:45,731 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 406 transitions. Word has length 137 [2022-11-20 11:54:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:45,732 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 406 transitions. [2022-11-20 11:54:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 406 transitions. [2022-11-20 11:54:45,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-20 11:54:45,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:45,749 INFO L195 NwaCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:54:45,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:54:45,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash 382291622, now seen corresponding path program 5 times [2022-11-20 11:54:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744819214] [2022-11-20 11:54:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:45,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-11-20 11:54:46,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744819214] [2022-11-20 11:54:46,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744819214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817658761] [2022-11-20 11:54:46,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:54:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:46,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:46,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:54:46,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2022-11-20 11:54:46,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:54:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-11-20 11:54:47,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2022-11-20 11:54:48,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817658761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:48,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:48,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-20 11:54:48,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748024357] [2022-11-20 11:54:48,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:54:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:54:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:54:48,195 INFO L87 Difference]: Start difference. First operand 378 states and 406 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:48,262 INFO L93 Difference]: Finished difference Result 567 states and 610 transitions. [2022-11-20 11:54:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:54:48,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2022-11-20 11:54:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:48,266 INFO L225 Difference]: With dead ends: 567 [2022-11-20 11:54:48,266 INFO L226 Difference]: Without dead ends: 564 [2022-11-20 11:54:48,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 748 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:54:48,268 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:48,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 53 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:54:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-20 11:54:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-20 11:54:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0763765541740675) internal successors, (606), 563 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2022-11-20 11:54:48,329 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 377 [2022-11-20 11:54:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:48,331 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2022-11-20 11:54:48,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:54:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2022-11-20 11:54:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-11-20 11:54:48,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:48,344 INFO L195 NwaCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2022-11-20 11:54:48,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:48,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:48,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 6 times [2022-11-20 11:54:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:48,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487743925] [2022-11-20 11:54:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:48,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2022-11-20 11:54:50,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487743925] [2022-11-20 11:54:50,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487743925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601296184] [2022-11-20 11:54:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:54:50,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:50,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:50,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:54:51,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-20 11:54:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:54:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:54:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 15736 proven. 1347 refuted. 0 times theorem prover too weak. 39290 trivial. 0 not checked. [2022-11-20 11:54:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 15736 proven. 1347 refuted. 0 times theorem prover too weak. 39290 trivial. 0 not checked. [2022-11-20 11:54:54,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601296184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:54,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:54,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 53 [2022-11-20 11:54:54,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591205729] [2022-11-20 11:54:54,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:54,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:54:54,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:54:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:54:54,011 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:03,632 INFO L93 Difference]: Finished difference Result 1047 states and 1127 transitions. [2022-11-20 11:55:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2022-11-20 11:55:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 563 [2022-11-20 11:55:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:03,634 INFO L225 Difference]: With dead ends: 1047 [2022-11-20 11:55:03,634 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 11:55:03,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1095 SyntacticMatches, 4 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43290 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=10998, Invalid=99558, Unknown=0, NotChecked=0, Total=110556 [2022-11-20 11:55:03,667 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1750 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:03,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 10 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:55:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 11:55:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 11:55:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 11:55:03,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2022-11-20 11:55:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 11:55:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 11:55:03,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 11:55:03,673 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:55:03,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 11:55:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:55:03,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 11:55:09,076 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 11:55:09,076 INFO L902 garLoopResultBuilder]: At program point L31(lines 15 32) the Hoare annotation is: true [2022-11-20 11:55:09,076 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-11-20 11:55:09,076 INFO L899 garLoopResultBuilder]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2022-11-20 11:55:09,077 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (let ((.cse1 (<= |ULTIMATE.start_main_~c~0#1| 6)) (.cse0 (<= |ULTIMATE.start_main_~a~0#1| 5)) (.cse2 (= 5 |ULTIMATE.start_main_~b~0#1|))) (or (and (= |ULTIMATE.start_main_~b~0#1| 0) .cse0 .cse1) (and (= |ULTIMATE.start_main_~c~0#1| 0) .cse0 .cse2) (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0 .cse1) (and .cse0 .cse1 (= 2 |ULTIMATE.start_main_~b~0#1|)) (and .cse0 (= 3 |ULTIMATE.start_main_~b~0#1|) .cse1) (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 .cse2) (and (= |ULTIMATE.start_main_~b~0#1| 4) .cse0 .cse1) (and .cse0 .cse2 (= 6 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 .cse2 (= |ULTIMATE.start_main_~c~0#1| 4)) (and .cse0 (= 5 |ULTIMATE.start_main_~c~0#1|) .cse2) (and .cse0 .cse2 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 .cse2 (= 3 |ULTIMATE.start_main_~c~0#1|)))) [2022-11-20 11:55:09,077 INFO L899 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2022-11-20 11:55:09,077 INFO L895 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 6) (< 5 |ULTIMATE.start_main_~b~0#1|) (< 5 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 6) (<= |ULTIMATE.start_main_~c~0#1| 6)) [2022-11-20 11:55:09,077 INFO L899 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2022-11-20 11:55:09,078 INFO L899 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2022-11-20 11:55:09,079 INFO L895 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (let ((.cse0 (< 5 |ULTIMATE.start_main_~c~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~a~0#1| 5)) (.cse2 (<= |ULTIMATE.start_main_~c~0#1| 6))) (or (and (= |ULTIMATE.start_main_~b~0#1| 4) .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse2 (= 2 |ULTIMATE.start_main_~b~0#1|)) (and .cse1 (= 5 |ULTIMATE.start_main_~b~0#1|) (= 6 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 .cse1 (= 3 |ULTIMATE.start_main_~b~0#1|) .cse2) (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0 .cse1 .cse2) (and (< 5 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~b~0#1| 6) .cse2) (and (= |ULTIMATE.start_main_~b~0#1| 0) .cse0 .cse1 .cse2))) [2022-11-20 11:55:09,082 INFO L444 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2022-11-20 11:55:09,084 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 11:55:09,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:55:09 BoogieIcfgContainer [2022-11-20 11:55:09,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 11:55:09,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 11:55:09,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 11:55:09,102 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 11:55:09,102 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:42" (3/4) ... [2022-11-20 11:55:09,105 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 11:55:09,114 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-11-20 11:55:09,115 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-20 11:55:09,115 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 11:55:09,115 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 11:55:09,145 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 11:55:09,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 11:55:09,146 INFO L158 Benchmark]: Toolchain (without parser) took 27459.92ms. Allocated memory was 142.6MB in the beginning and 448.8MB in the end (delta: 306.2MB). Free memory was 99.4MB in the beginning and 306.3MB in the end (delta: -207.0MB). Peak memory consumption was 102.4MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,146 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 142.6MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:55:09,146 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.56ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 89.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,147 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.31ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 88.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,147 INFO L158 Benchmark]: Boogie Preprocessor took 18.13ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:55:09,147 INFO L158 Benchmark]: RCFGBuilder took 231.42ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 77.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,148 INFO L158 Benchmark]: TraceAbstraction took 26905.30ms. Allocated memory was 142.6MB in the beginning and 448.8MB in the end (delta: 306.2MB). Free memory was 76.7MB in the beginning and 308.4MB in the end (delta: -231.8MB). Peak memory consumption was 234.5MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,148 INFO L158 Benchmark]: Witness Printer took 43.74ms. Allocated memory is still 448.8MB. Free memory was 308.4MB in the beginning and 306.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:55:09,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 142.6MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.56ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 89.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.31ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 88.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.13ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 231.42ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 77.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 26905.30ms. Allocated memory was 142.6MB in the beginning and 448.8MB in the end (delta: 306.2MB). Free memory was 76.7MB in the beginning and 308.4MB in the end (delta: -231.8MB). Peak memory consumption was 234.5MB. Max. memory is 16.1GB. * Witness Printer took 43.74ms. Allocated memory is still 448.8MB. Free memory was 308.4MB in the beginning and 306.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.8s, OverallIterations: 10, TraceHistogramMax: 216, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1908 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1908 mSDsluCounter, 294 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 189 mSDsCounter, 1212 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1321 IncrementalHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1212 mSolverCounterUnsat, 105 mSDtfsCounter, 1321 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2638 GetRequests, 2248 SyntacticMatches, 12 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43417 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=9, InterpolantAutomatonStates: 353, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 230 HoareAnnotationTreeSize, 4 FomulaSimplifications, 3999 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 4 FomulaSimplificationsInter, 2952 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 2323 NumberOfCodeBlocks, 2037 NumberOfCodeBlocksAsserted, 241 NumberOfCheckSat, 3448 ConstructedInterpolants, 0 QuantifiedInterpolants, 10241 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1531 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 144771/252987 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((a <= 6 && 5 < b) && 5 < c) && b <= 6) && c <= 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((b == 0 && a <= 5) && c <= 6) || ((c == 0 && a <= 5) && 5 == b)) || ((b == 1 && a <= 5) && c <= 6)) || ((a <= 5 && c <= 6) && 2 == b)) || ((a <= 5 && 3 == b) && c <= 6)) || ((c == 1 && a <= 5) && 5 == b)) || ((b == 4 && a <= 5) && c <= 6)) || ((a <= 5 && 5 == b) && 6 == c)) || ((a <= 5 && 5 == b) && c == 4)) || ((a <= 5 && 5 == c) && 5 == b)) || ((a <= 5 && 5 == b) && 2 == c)) || ((a <= 5 && 5 == b) && 3 == c) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((b == 4 && 5 < c) && a <= 5) && c <= 6) || (((5 < c && a <= 5) && c <= 6) && 2 == b)) || ((a <= 5 && 5 == b) && 6 == c)) || (((5 < c && a <= 5) && 3 == b) && c <= 6)) || (((b == 1 && 5 < c) && a <= 5) && c <= 6)) || ((((5 < b && 5 < c) && a <= 5) && b <= 6) && c <= 6)) || (((b == 0 && 5 < c) && a <= 5) && c <= 6) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-20 11:55:09,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135a5dae-5f12-4c3c-895a-b01fc2e110b6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE