./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:11:05,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:11:05,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:11:05,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:11:05,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:11:05,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:11:05,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:11:05,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:11:05,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:11:05,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:11:05,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:11:05,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:11:05,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:11:05,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:11:05,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:11:05,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:11:05,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:11:05,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:11:05,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:11:05,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:11:05,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:11:05,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:11:05,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:11:05,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:11:05,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:11:05,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:11:05,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:11:05,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:11:05,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:11:05,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:11:05,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:11:05,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:11:05,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:11:05,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:11:05,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:11:05,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:11:05,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:11:05,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:11:05,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:11:05,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:11:05,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:11:05,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:11:05,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:11:05,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:11:05,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:11:05,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:11:05,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:11:05,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:11:05,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:11:05,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:11:05,246 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:11:05,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:11:05,247 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:11:05,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:11:05,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:11:05,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:11:05,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:11:05,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:11:05,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:11:05,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:11:05,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:11:05,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:11:05,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:11:05,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:11:05,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:11:05,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:11:05,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:11:05,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:11:05,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:11:05,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:11:05,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:11:05,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:11:05,253 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:11:05,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:11:05,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:11:05,254 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_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 [2022-11-18 20:11:05,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:11:05,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:11:05,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:11:05,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:11:05,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:11:05,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-11-18 20:11:05,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/data/7e2ec8e0c/c0e9b966dc964dfba4e10f1627a1e8fd/FLAG4a789dfe3 [2022-11-18 20:11:06,188 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:11:06,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-11-18 20:11:06,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/data/7e2ec8e0c/c0e9b966dc964dfba4e10f1627a1e8fd/FLAG4a789dfe3 [2022-11-18 20:11:06,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/data/7e2ec8e0c/c0e9b966dc964dfba4e10f1627a1e8fd [2022-11-18 20:11:06,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:11:06,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:11:06,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:06,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:11:06,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:11:06,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:06" (1/1) ... [2022-11-18 20:11:06,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554a8333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:06, skipping insertion in model container [2022-11-18 20:11:06,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:11:06" (1/1) ... [2022-11-18 20:11:06,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:11:06,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:11:07,225 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2022-11-18 20:11:07,249 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2022-11-18 20:11:07,391 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2022-11-18 20:11:07,392 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2022-11-18 20:11:07,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:07,418 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:11:07,449 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2022-11-18 20:11:07,451 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2022-11-18 20:11:07,515 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2022-11-18 20:11:07,521 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2022-11-18 20:11:07,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:11:07,590 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:11:07,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07 WrapperNode [2022-11-18 20:11:07,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:11:07,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:07,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:11:07,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:11:07,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,785 INFO L138 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1036 [2022-11-18 20:11:07,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:11:07,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:11:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:11:07,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:11:07,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,870 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:11:07,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:11:07,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:11:07,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:11:07,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (1/1) ... [2022-11-18 20:11:07,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:11:07,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:07,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:11:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:11:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:11:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-18 20:11:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:11:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:11:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-11-18 20:11:07,986 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-11-18 20:11:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:11:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:11:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:11:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:11:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:11:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:11:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-11-18 20:11:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-11-18 20:11:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:11:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-11-18 20:11:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-11-18 20:11:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:11:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:11:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:11:08,286 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:11:08,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:11:09,787 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:11:09,799 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:11:09,800 INFO L300 CfgBuilder]: Removed 63 assume(true) statements. [2022-11-18 20:11:09,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:09 BoogieIcfgContainer [2022-11-18 20:11:09,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:11:09,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:11:09,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:11:09,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:11:09,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:11:06" (1/3) ... [2022-11-18 20:11:09,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6a05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:11:09, skipping insertion in model container [2022-11-18 20:11:09,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:11:07" (2/3) ... [2022-11-18 20:11:09,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6a05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:11:09, skipping insertion in model container [2022-11-18 20:11:09,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:11:09" (3/3) ... [2022-11-18 20:11:09,821 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-1.i [2022-11-18 20:11:09,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:11:09,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-18 20:11:09,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:11:09,946 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;@5c36eebd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:11:09,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 20:11:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 201 states have (on average 1.63681592039801) internal successors, (329), 205 states have internal predecessors, (329), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 20:11:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:11:09,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:09,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:09,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -927886968, now seen corresponding path program 1 times [2022-11-18 20:11:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084139156] [2022-11-18 20:11:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:10,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:10,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084139156] [2022-11-18 20:11:10,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084139156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:10,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:10,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:11:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815596363] [2022-11-18 20:11:10,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:11:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:11:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:11:10,302 INFO L87 Difference]: Start difference. First operand has 223 states, 201 states have (on average 1.63681592039801) internal successors, (329), 205 states have internal predecessors, (329), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-18 20:11:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:10,407 INFO L93 Difference]: Finished difference Result 441 states and 718 transitions. [2022-11-18 20:11:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:11:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 [2022-11-18 20:11:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:10,427 INFO L225 Difference]: With dead ends: 441 [2022-11-18 20:11:10,428 INFO L226 Difference]: Without dead ends: 216 [2022-11-18 20:11:10,436 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 [2022-11-18 20:11:10,442 INFO L413 NwaCegarLoop]: 282 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, 282 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:10,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:11:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-18 20:11:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-11-18 20:11:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 200 states have internal predecessors, (253), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:11:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 278 transitions. [2022-11-18 20:11:10,526 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 278 transitions. Word has length 8 [2022-11-18 20:11:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:10,527 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 278 transitions. [2022-11-18 20:11:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-18 20:11:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 278 transitions. [2022-11-18 20:11:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:11:10,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:10,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:10,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:11:10,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1603506083, now seen corresponding path program 1 times [2022-11-18 20:11:10,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278871408] [2022-11-18 20:11:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:10,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278871408] [2022-11-18 20:11:10,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278871408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:11:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270630210] [2022-11-18 20:11:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:11:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:11:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:11:10,828 INFO L87 Difference]: Start difference. First operand 216 states and 278 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-18 20:11:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:11,349 INFO L93 Difference]: Finished difference Result 453 states and 587 transitions. [2022-11-18 20:11:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:11:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-11-18 20:11:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:11,351 INFO L225 Difference]: With dead ends: 453 [2022-11-18 20:11:11,351 INFO L226 Difference]: Without dead ends: 344 [2022-11-18 20:11:11,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:11:11,353 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 153 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:11,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 700 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:11:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-18 20:11:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 218. [2022-11-18 20:11:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.2944162436548223) internal successors, (255), 202 states have internal predecessors, (255), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:11:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2022-11-18 20:11:11,380 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 10 [2022-11-18 20:11:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:11,380 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2022-11-18 20:11:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-18 20:11:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2022-11-18 20:11:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:11:11,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:11,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:11:11,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1294374422, now seen corresponding path program 1 times [2022-11-18 20:11:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713501054] [2022-11-18 20:11:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:11,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:11,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598781824] [2022-11-18 20:11:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:11,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:11,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:11:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:11:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:11,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:11,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:11,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713501054] [2022-11-18 20:11:11,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:11,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598781824] [2022-11-18 20:11:11,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598781824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:11,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:11,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:11:11,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520721239] [2022-11-18 20:11:11,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:11,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:11:11,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:11:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:11,775 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:11,877 INFO L93 Difference]: Finished difference Result 453 states and 587 transitions. [2022-11-18 20:11:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:11:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-18 20:11:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:11,879 INFO L225 Difference]: With dead ends: 453 [2022-11-18 20:11:11,879 INFO L226 Difference]: Without dead ends: 239 [2022-11-18 20:11:11,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:11,881 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 9 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:11,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 501 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-18 20:11:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-11-18 20:11:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 217 states have (on average 1.2672811059907834) internal successors, (275), 222 states have internal predecessors, (275), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:11:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2022-11-18 20:11:11,906 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 47 [2022-11-18 20:11:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:11,907 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2022-11-18 20:11:11,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2022-11-18 20:11:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:11:11,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:11,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:11,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:12,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1153825812, now seen corresponding path program 1 times [2022-11-18 20:11:12,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:12,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856272433] [2022-11-18 20:11:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:12,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:12,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328793907] [2022-11-18 20:11:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:12,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:12,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:12,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:11:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:11:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:12,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856272433] [2022-11-18 20:11:12,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328793907] [2022-11-18 20:11:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328793907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:12,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:11:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977845462] [2022-11-18 20:11:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:11:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:11:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:11:12,524 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:12,623 INFO L93 Difference]: Finished difference Result 465 states and 589 transitions. [2022-11-18 20:11:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:11:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-18 20:11:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:12,625 INFO L225 Difference]: With dead ends: 465 [2022-11-18 20:11:12,626 INFO L226 Difference]: Without dead ends: 231 [2022-11-18 20:11:12,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:11:12,631 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:12,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 550 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-18 20:11:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2022-11-18 20:11:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 203 states have (on average 1.251231527093596) internal successors, (254), 208 states have internal predecessors, (254), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:11:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 279 transitions. [2022-11-18 20:11:12,665 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 279 transitions. Word has length 47 [2022-11-18 20:11:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:12,668 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 279 transitions. [2022-11-18 20:11:12,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 279 transitions. [2022-11-18 20:11:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:11:12,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:12,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:12,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:12,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:12,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1711391966, now seen corresponding path program 1 times [2022-11-18 20:11:12,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378587985] [2022-11-18 20:11:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:12,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:12,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413160760] [2022-11-18 20:11:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:12,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:12,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:11:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:11:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:13,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:13,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378587985] [2022-11-18 20:11:13,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413160760] [2022-11-18 20:11:13,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413160760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:13,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:13,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:11:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643202852] [2022-11-18 20:11:13,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:11:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:11:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:11:13,983 INFO L87 Difference]: Start difference. First operand 224 states and 279 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:14,542 INFO L93 Difference]: Finished difference Result 237 states and 292 transitions. [2022-11-18 20:11:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:11:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-18 20:11:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:14,544 INFO L225 Difference]: With dead ends: 237 [2022-11-18 20:11:14,544 INFO L226 Difference]: Without dead ends: 235 [2022-11-18 20:11:14,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:11:14,545 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 449 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:14,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1243 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:11:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-18 20:11:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-11-18 20:11:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 210 states have (on average 1.2476190476190476) internal successors, (262), 216 states have internal predecessors, (262), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:11:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 289 transitions. [2022-11-18 20:11:14,562 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 289 transitions. Word has length 47 [2022-11-18 20:11:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:14,563 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 289 transitions. [2022-11-18 20:11:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 289 transitions. [2022-11-18 20:11:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 20:11:14,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:14,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:14,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:14,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1570252530, now seen corresponding path program 1 times [2022-11-18 20:11:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:14,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152696298] [2022-11-18 20:11:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:14,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015429380] [2022-11-18 20:11:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:14,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:14,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:14,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:11:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:11:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:15,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:15,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152696298] [2022-11-18 20:11:15,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015429380] [2022-11-18 20:11:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015429380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:15,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:11:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369557901] [2022-11-18 20:11:15,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:15,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:11:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:11:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:15,638 INFO L87 Difference]: Start difference. First operand 234 states and 289 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:15,664 INFO L93 Difference]: Finished difference Result 465 states and 576 transitions. [2022-11-18 20:11:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:11:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-18 20:11:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:15,666 INFO L225 Difference]: With dead ends: 465 [2022-11-18 20:11:15,666 INFO L226 Difference]: Without dead ends: 235 [2022-11-18 20:11:15,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:15,669 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 0 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 535 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 [2022-11-18 20:11:15,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 535 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:11:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-18 20:11:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-18 20:11:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 211 states have (on average 1.2464454976303319) internal successors, (263), 217 states have internal predecessors, (263), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:11:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 290 transitions. [2022-11-18 20:11:15,685 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 290 transitions. Word has length 58 [2022-11-18 20:11:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:15,687 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 290 transitions. [2022-11-18 20:11:15,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 290 transitions. [2022-11-18 20:11:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 20:11:15,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:15,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:15,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:15,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:11:15,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1963279540, now seen corresponding path program 1 times [2022-11-18 20:11:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:15,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073784019] [2022-11-18 20:11:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:16,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816914510] [2022-11-18 20:11:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:16,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:16,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:16,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:16,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:11:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:11:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:17,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:17,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073784019] [2022-11-18 20:11:17,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:17,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816914510] [2022-11-18 20:11:17,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816914510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:17,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:17,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:11:17,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534859880] [2022-11-18 20:11:17,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:17,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:11:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:11:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:17,042 INFO L87 Difference]: Start difference. First operand 235 states and 290 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:17,178 INFO L93 Difference]: Finished difference Result 588 states and 730 transitions. [2022-11-18 20:11:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:11:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-18 20:11:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:17,181 INFO L225 Difference]: With dead ends: 588 [2022-11-18 20:11:17,181 INFO L226 Difference]: Without dead ends: 357 [2022-11-18 20:11:17,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:11:17,182 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 106 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:17,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 556 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-18 20:11:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 343. [2022-11-18 20:11:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 319 states have (on average 1.2476489028213167) internal successors, (398), 325 states have internal predecessors, (398), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:11:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 425 transitions. [2022-11-18 20:11:17,199 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 425 transitions. Word has length 58 [2022-11-18 20:11:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:17,199 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 425 transitions. [2022-11-18 20:11:17,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 425 transitions. [2022-11-18 20:11:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:11:17,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:17,201 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:17,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:11:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:17,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 587872756, now seen corresponding path program 1 times [2022-11-18 20:11:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:17,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726153845] [2022-11-18 20:11:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:17,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:17,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127700509] [2022-11-18 20:11:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:17,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:17,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:11:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:11:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:18,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726153845] [2022-11-18 20:11:18,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127700509] [2022-11-18 20:11:18,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127700509] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:11:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2022-11-18 20:11:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823044655] [2022-11-18 20:11:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:11:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:11:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:11:18,272 INFO L87 Difference]: Start difference. First operand 343 states and 425 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:11:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:18,435 INFO L93 Difference]: Finished difference Result 1224 states and 1560 transitions. [2022-11-18 20:11:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:11:18,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-11-18 20:11:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:18,441 INFO L225 Difference]: With dead ends: 1224 [2022-11-18 20:11:18,441 INFO L226 Difference]: Without dead ends: 930 [2022-11-18 20:11:18,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:11:18,443 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 925 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:18,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 1149 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-18 20:11:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 571. [2022-11-18 20:11:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 542 states have (on average 1.2601476014760147) internal successors, (683), 548 states have internal predecessors, (683), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-18 20:11:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 715 transitions. [2022-11-18 20:11:18,475 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 715 transitions. Word has length 62 [2022-11-18 20:11:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:18,476 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 715 transitions. [2022-11-18 20:11:18,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:11:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 715 transitions. [2022-11-18 20:11:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 20:11:18,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:18,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:18,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:11:18,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 391994033, now seen corresponding path program 1 times [2022-11-18 20:11:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460904240] [2022-11-18 20:11:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:18,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:18,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330598512] [2022-11-18 20:11:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:18,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:11:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:11:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:11:19,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:19,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460904240] [2022-11-18 20:11:19,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:19,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330598512] [2022-11-18 20:11:19,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330598512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:19,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:19,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:11:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330431743] [2022-11-18 20:11:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:11:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:11:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:11:19,447 INFO L87 Difference]: Start difference. First operand 571 states and 715 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:19,581 INFO L93 Difference]: Finished difference Result 1074 states and 1354 transitions. [2022-11-18 20:11:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:11:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2022-11-18 20:11:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:19,584 INFO L225 Difference]: With dead ends: 1074 [2022-11-18 20:11:19,584 INFO L226 Difference]: Without dead ends: 571 [2022-11-18 20:11:19,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:11:19,586 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 25 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:19,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 969 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-18 20:11:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2022-11-18 20:11:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 542 states have (on average 1.2601476014760147) internal successors, (683), 548 states have internal predecessors, (683), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:11:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 714 transitions. [2022-11-18 20:11:19,614 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 714 transitions. Word has length 93 [2022-11-18 20:11:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:19,614 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 714 transitions. [2022-11-18 20:11:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:11:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 714 transitions. [2022-11-18 20:11:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:11:19,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:19,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:19,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:19,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1931648614, now seen corresponding path program 1 times [2022-11-18 20:11:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202537517] [2022-11-18 20:11:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:19,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147676008] [2022-11-18 20:11:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:19,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:19,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:11:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:11:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:20,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:11:20,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:11:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:11:20,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:20,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202537517] [2022-11-18 20:11:20,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147676008] [2022-11-18 20:11:20,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147676008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:20,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:20,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:11:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509054500] [2022-11-18 20:11:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:20,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:11:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:11:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:11:20,543 INFO L87 Difference]: Start difference. First operand 571 states and 714 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:11:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:20,920 INFO L93 Difference]: Finished difference Result 777 states and 991 transitions. [2022-11-18 20:11:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:11:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2022-11-18 20:11:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:20,926 INFO L225 Difference]: With dead ends: 777 [2022-11-18 20:11:20,926 INFO L226 Difference]: Without dead ends: 764 [2022-11-18 20:11:20,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:11:20,927 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 108 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:20,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 712 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:11:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-18 20:11:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 575. [2022-11-18 20:11:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 546 states have (on average 1.2582417582417582) internal successors, (687), 552 states have internal predecessors, (687), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:11:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 718 transitions. [2022-11-18 20:11:20,957 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 718 transitions. Word has length 98 [2022-11-18 20:11:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:20,958 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 718 transitions. [2022-11-18 20:11:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:11:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 718 transitions. [2022-11-18 20:11:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-18 20:11:20,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:20,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:20,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 20:11:21,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:21,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1308714049, now seen corresponding path program 1 times [2022-11-18 20:11:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238861256] [2022-11-18 20:11:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:21,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:21,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658201821] [2022-11-18 20:11:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:21,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:21,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:21,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:11:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:22,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:11:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:11:22,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:11:22,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238861256] [2022-11-18 20:11:22,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658201821] [2022-11-18 20:11:22,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658201821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:11:22,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:11:22,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:11:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615390841] [2022-11-18 20:11:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:22,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:11:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:11:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:11:22,258 INFO L87 Difference]: Start difference. First operand 575 states and 718 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 20:11:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:22,435 INFO L93 Difference]: Finished difference Result 1090 states and 1373 transitions. [2022-11-18 20:11:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:11:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 108 [2022-11-18 20:11:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:22,439 INFO L225 Difference]: With dead ends: 1090 [2022-11-18 20:11:22,439 INFO L226 Difference]: Without dead ends: 580 [2022-11-18 20:11:22,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:11:22,441 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 18 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:22,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1767 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:11:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-18 20:11:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-11-18 20:11:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 550 states have (on average 1.2581818181818183) internal successors, (692), 557 states have internal predecessors, (692), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-18 20:11:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 724 transitions. [2022-11-18 20:11:22,474 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 724 transitions. Word has length 108 [2022-11-18 20:11:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:22,474 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 724 transitions. [2022-11-18 20:11:22,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 20:11:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 724 transitions. [2022-11-18 20:11:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 20:11:22,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:22,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:22,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:22,689 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2136005715, now seen corresponding path program 1 times [2022-11-18 20:11:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:22,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823329194] [2022-11-18 20:11:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:22,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:22,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270778519] [2022-11-18 20:11:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:22,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:22,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:22,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:11:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:11:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:11:24,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:11:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823329194] [2022-11-18 20:11:25,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270778519] [2022-11-18 20:11:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270778519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:25,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:11:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2022-11-18 20:11:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330066183] [2022-11-18 20:11:25,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:25,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:11:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:11:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:11:25,089 INFO L87 Difference]: Start difference. First operand 580 states and 724 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:11:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:25,436 INFO L93 Difference]: Finished difference Result 1113 states and 1405 transitions. [2022-11-18 20:11:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:11:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 110 [2022-11-18 20:11:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:25,440 INFO L225 Difference]: With dead ends: 1113 [2022-11-18 20:11:25,440 INFO L226 Difference]: Without dead ends: 596 [2022-11-18 20:11:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:11:25,442 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 33 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:25,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2279 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:11:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-18 20:11:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 593. [2022-11-18 20:11:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 562 states have (on average 1.2633451957295374) internal successors, (710), 569 states have internal predecessors, (710), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-18 20:11:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 742 transitions. [2022-11-18 20:11:25,473 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 742 transitions. Word has length 110 [2022-11-18 20:11:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:25,473 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 742 transitions. [2022-11-18 20:11:25,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:11:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 742 transitions. [2022-11-18 20:11:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 20:11:25,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:25,475 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:25,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:25,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:25,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1680231647, now seen corresponding path program 2 times [2022-11-18 20:11:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917999945] [2022-11-18 20:11:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:25,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:25,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:25,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504714559] [2022-11-18 20:11:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:25,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:25,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:11:35,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:11:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:11:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:11:35,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917999945] [2022-11-18 20:11:35,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:11:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504714559] [2022-11-18 20:11:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504714559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:35,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:11:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2022-11-18 20:11:35,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762313766] [2022-11-18 20:11:35,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:35,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:11:35,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:11:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:11:35,692 INFO L87 Difference]: Start difference. First operand 593 states and 742 transitions. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:11:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:37,154 INFO L93 Difference]: Finished difference Result 1206 states and 1522 transitions. [2022-11-18 20:11:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:11:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 114 [2022-11-18 20:11:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:37,159 INFO L225 Difference]: With dead ends: 1206 [2022-11-18 20:11:37,159 INFO L226 Difference]: Without dead ends: 611 [2022-11-18 20:11:37,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:11:37,163 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 299 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:37,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 2803 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:11:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-18 20:11:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 599. [2022-11-18 20:11:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 568 states have (on average 1.2605633802816902) internal successors, (716), 575 states have internal predecessors, (716), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-18 20:11:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 748 transitions. [2022-11-18 20:11:37,201 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 748 transitions. Word has length 114 [2022-11-18 20:11:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:37,201 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 748 transitions. [2022-11-18 20:11:37,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:11:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 748 transitions. [2022-11-18 20:11:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:11:37,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:37,203 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:37,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:11:37,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:11:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1996387754, now seen corresponding path program 3 times [2022-11-18 20:11:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375344313] [2022-11-18 20:11:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:37,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:11:37,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740514796] [2022-11-18 20:11:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:11:37,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:37,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:37,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045b6641-4728-41dd-b6a0-0a29b78ce90a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process