./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc --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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- 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-5e519f3 [2022-11-02 20:41:08,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:41:08,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:41:08,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:41:08,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:41:08,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:41:08,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:41:08,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:41:08,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:41:08,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:41:08,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:41:08,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:41:08,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:41:08,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:41:08,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:41:08,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:41:08,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:41:08,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:41:08,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:41:08,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:41:08,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:41:08,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:41:08,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:41:08,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:41:08,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:41:08,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:41:08,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:41:08,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:41:08,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:41:08,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:41:08,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:41:08,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:41:08,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:41:08,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:41:08,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:41:08,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:41:08,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:41:08,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:41:08,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:41:08,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:41:08,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:41:08,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:41:08,524 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:41:08,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:41:08,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:41:08,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:41:08,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:41:08,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:41:08,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:41:08,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:41:08,528 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:41:08,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:41:08,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:41:08,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:41:08,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:41:08,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:41:08,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:41:08,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:41:08,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:41:08,532 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:41:08,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:41:08,532 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:41:08,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:41:08,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:41:08,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:41:08,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:41:08,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:41:08,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:41:08,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:41:08,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:41:08,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:41:08,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:41:08,535 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:41:08,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:41:08,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:41:08,536 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_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2022-11-02 20:41:08,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:41:08,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:41:08,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:41:08,850 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:41:08,851 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:41:08,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loop-new/count_by_2.i [2022-11-02 20:41:08,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/data/7217ff309/f06a222f0c5f4d6693619dbdf2e5f892/FLAGc43d0cc4d [2022-11-02 20:41:09,405 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:41:09,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/sv-benchmarks/c/loop-new/count_by_2.i [2022-11-02 20:41:09,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/data/7217ff309/f06a222f0c5f4d6693619dbdf2e5f892/FLAGc43d0cc4d [2022-11-02 20:41:09,785 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/data/7217ff309/f06a222f0c5f4d6693619dbdf2e5f892 [2022-11-02 20:41:09,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:41:09,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:41:09,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:41:09,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:41:09,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:41:09,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:41:09" (1/1) ... [2022-11-02 20:41:09,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d6248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:09, skipping insertion in model container [2022-11-02 20:41:09,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:41:09" (1/1) ... [2022-11-02 20:41:09,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:41:09,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:41:10,077 WARN L230 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_1c6f333f-202f-470c-8ded-8f39feed01ab/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2022-11-02 20:41:10,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:10,093 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:41:10,106 WARN L230 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_1c6f333f-202f-470c-8ded-8f39feed01ab/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2022-11-02 20:41:10,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:10,122 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:41:10,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10 WrapperNode [2022-11-02 20:41:10,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:41:10,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:10,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:41:10,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:41:10,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,155 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2022-11-02 20:41:10,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:10,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:41:10,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:41:10,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:41:10,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:41:10,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:41:10,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:41:10,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:41:10,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (1/1) ... [2022-11-02 20:41:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:41:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:10,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:41:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:41:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:41:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:41:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:41:10,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:41:10,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:41:10,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:41:10,510 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:41:10,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:41:10,518 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:41:10,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:10 BoogieIcfgContainer [2022-11-02 20:41:10,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:41:10,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:41:10,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:41:10,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:41:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:41:09" (1/3) ... [2022-11-02 20:41:10,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9ec5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:10, skipping insertion in model container [2022-11-02 20:41:10,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:10" (2/3) ... [2022-11-02 20:41:10,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9ec5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:10, skipping insertion in model container [2022-11-02 20:41:10,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:10" (3/3) ... [2022-11-02 20:41:10,534 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-11-02 20:41:10,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:41:10,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:41:10,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:41:10,650 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;@19f07a2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:41:10,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:41:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:41:10,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:10,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:41:10,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-11-02 20:41:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:10,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476775201] [2022-11-02 20:41:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:11,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476775201] [2022-11-02 20:41:11,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476775201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:11,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:11,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283844916] [2022-11-02 20:41:11,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:11,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:11,079 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:41:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:11,143 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-11-02 20:41:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-02 20:41:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:11,155 INFO L225 Difference]: With dead ends: 22 [2022-11-02 20:41:11,155 INFO L226 Difference]: Without dead ends: 10 [2022-11-02 20:41:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:11,163 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 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 [2022-11-02 20:41:11,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-02 20:41:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-02 20:41:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-02 20:41:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-02 20:41:11,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-11-02 20:41:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:11,243 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-02 20:41:11,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:41:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-02 20:41:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:41:11,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:11,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:11,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:41:11,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-11-02 20:41:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:11,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898992449] [2022-11-02 20:41:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:11,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898992449] [2022-11-02 20:41:11,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898992449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867528019] [2022-11-02 20:41:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:11,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:41:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867528019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:11,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:11,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:41:11,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657824001] [2022-11-02 20:41:11,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:41:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:41:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:41:11,532 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:11,583 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-02 20:41:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:41:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:41:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:11,584 INFO L225 Difference]: With dead ends: 19 [2022-11-02 20:41:11,585 INFO L226 Difference]: Without dead ends: 15 [2022-11-02 20:41:11,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:41:11,587 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:11,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-02 20:41:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-02 20:41:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-02 20:41:11,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-02 20:41:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:11,593 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-02 20:41:11,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-02 20:41:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:41:11,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:11,595 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:11,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:11,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:11,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-11-02 20:41:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376619422] [2022-11-02 20:41:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376619422] [2022-11-02 20:41:12,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376619422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:12,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324493359] [2022-11-02 20:41:12,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:12,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:12,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:12,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:41:12,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:12,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:12,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:41:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:12,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324493359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:12,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:12,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 20:41:12,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448339283] [2022-11-02 20:41:12,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:41:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:41:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:41:12,323 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-11-02 20:41:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:12,389 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-02 20:41:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:41:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 14 [2022-11-02 20:41:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:12,391 INFO L225 Difference]: With dead ends: 31 [2022-11-02 20:41:12,391 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 20:41:12,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:41:12,393 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:12,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 20:41:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-02 20:41:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-11-02 20:41:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-02 20:41:12,410 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-02 20:41:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:12,410 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-02 20:41:12,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-11-02 20:41:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-02 20:41:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:41:12,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:12,412 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:12,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:12,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-11-02 20:41:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:12,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42759801] [2022-11-02 20:41:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42759801] [2022-11-02 20:41:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42759801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70600765] [2022-11-02 20:41:12,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:41:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:12,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:41:12,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 20:41:12,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:12,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:41:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:13,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:13,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70600765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:13,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:13,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-02 20:41:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532582953] [2022-11-02 20:41:13,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:41:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:41:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:41:13,356 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:41:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:13,455 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-11-02 20:41:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:41:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 26 [2022-11-02 20:41:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:13,457 INFO L225 Difference]: With dead ends: 55 [2022-11-02 20:41:13,457 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 20:41:13,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:41:13,459 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:13,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 20:41:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-02 20:41:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2022-11-02 20:41:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-02 20:41:13,469 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-02 20:41:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:13,470 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-02 20:41:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:41:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-02 20:41:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:41:13,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:13,472 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:13,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:13,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-11-02 20:41:13,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:13,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181751697] [2022-11-02 20:41:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181751697] [2022-11-02 20:41:14,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181751697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:14,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646063772] [2022-11-02 20:41:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:41:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:14,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:14,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:41:14,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:41:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:41:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:14,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:15,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646063772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:15,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:15,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-02 20:41:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12701209] [2022-11-02 20:41:15,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:15,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:41:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:41:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:41:15,729 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-11-02 20:41:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:15,947 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-11-02 20:41:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:41:15,948 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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 50 [2022-11-02 20:41:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:15,949 INFO L225 Difference]: With dead ends: 103 [2022-11-02 20:41:15,949 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 20:41:15,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:41:15,952 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:15,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 20:41:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-02 20:41:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-11-02 20:41:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-11-02 20:41:15,964 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-11-02 20:41:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:15,965 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-11-02 20:41:15,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-11-02 20:41:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-11-02 20:41:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-02 20:41:15,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:15,968 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:16,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 20:41:16,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:16,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-11-02 20:41:16,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327521662] [2022-11-02 20:41:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327521662] [2022-11-02 20:41:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327521662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148048355] [2022-11-02 20:41:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:41:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:18,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:18,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:41:18,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-02 20:41:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:41:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148048355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:21,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-02 20:41:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793664402] [2022-11-02 20:41:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:21,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-02 20:41:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-02 20:41:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-02 20:41:21,723 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-11-02 20:41:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:22,126 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-11-02 20:41:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-02 20:41:22,127 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 98 [2022-11-02 20:41:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:22,136 INFO L225 Difference]: With dead ends: 199 [2022-11-02 20:41:22,136 INFO L226 Difference]: Without dead ends: 195 [2022-11-02 20:41:22,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-02 20:41:22,142 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 18 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:41:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-02 20:41:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-02 20:41:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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) [2022-11-02 20:41:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-11-02 20:41:22,180 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-11-02 20:41:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:22,182 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-11-02 20:41:22,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-11-02 20:41:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-11-02 20:41:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-02 20:41:22,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:22,197 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:22,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:22,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:22,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-11-02 20:41:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:22,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774832325] [2022-11-02 20:41:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:28,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774832325] [2022-11-02 20:41:28,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774832325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387793957] [2022-11-02 20:41:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:41:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:28,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:28,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:41:28,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-02 20:41:28,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-02 20:41:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:40,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387793957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:40,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:40,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-11-02 20:41:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299527556] [2022-11-02 20:41:40,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-02 20:41:40,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-02 20:41:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-02 20:41:40,742 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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) [2022-11-02 20:41:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:41,943 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2022-11-02 20:41:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-02 20:41:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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 194 [2022-11-02 20:41:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:41,947 INFO L225 Difference]: With dead ends: 391 [2022-11-02 20:41:41,947 INFO L226 Difference]: Without dead ends: 387 [2022-11-02 20:41:41,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-02 20:41:41,951 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:41,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 18 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:41:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-02 20:41:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-11-02 20:41:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 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) [2022-11-02 20:41:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-11-02 20:41:41,977 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-11-02 20:41:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:41,978 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-11-02 20:41:41,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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) [2022-11-02 20:41:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-11-02 20:41:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-02 20:41:41,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:41,984 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:42,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:42,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2022-11-02 20:41:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:42,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726928614] [2022-11-02 20:41:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:05,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:05,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726928614] [2022-11-02 20:42:05,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726928614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:05,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630225354] [2022-11-02 20:42:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:42:05,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:05,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:05,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:42:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-02 20:42:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:06,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:53,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630225354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:53,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:53,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-11-02 20:42:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675297439] [2022-11-02 20:42:53,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:53,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-02 20:42:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-02 20:42:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-11-02 20:42:53,187 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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) [2022-11-02 20:42:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:58,171 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2022-11-02 20:42:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-02 20:42:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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 386 [2022-11-02 20:42:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:58,179 INFO L225 Difference]: With dead ends: 775 [2022-11-02 20:42:58,179 INFO L226 Difference]: Without dead ends: 771 [2022-11-02 20:42:58,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-11-02 20:42:58,190 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 573 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:58,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 24 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:42:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-02 20:42:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-02 20:42:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 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) [2022-11-02 20:42:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-11-02 20:42:58,223 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-11-02 20:42:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:58,224 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-11-02 20:42:58,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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) [2022-11-02 20:42:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-11-02 20:42:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-11-02 20:42:58,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:58,249 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:58,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f333f-202f-470c-8ded-8f39feed01ab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:58,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2022-11-02 20:42:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:58,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935090391] [2022-11-02 20:42:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat