./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:37:59,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:37:59,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:38:00,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:38:00,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:38:00,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:38:00,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:38:00,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:38:00,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:38:00,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:38:00,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:38:00,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:38:00,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:38:00,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:38:00,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:38:00,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:38:00,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:38:00,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:38:00,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:38:00,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:38:00,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:38:00,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:38:00,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:38:00,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:38:00,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:38:00,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:38:00,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:38:00,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:38:00,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:38:00,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:38:00,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:38:00,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:38:00,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:38:00,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:38:00,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:38:00,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:38:00,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:38:00,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:38:00,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:38:00,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:38:00,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:38:00,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:38:00,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:38:00,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:38:00,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:38:00,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:38:00,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:38:00,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:38:00,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:38:00,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:38:00,131 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:38:00,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:38:00,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:38:00,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:38:00,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:38:00,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:38:00,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:38:00,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:38:00,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:38:00,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:38:00,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:38:00,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:38:00,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:38:00,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:38:00,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:38:00,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:38:00,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:00,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:38:00,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:38:00,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:38:00,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:38:00,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:38:00,136 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:38:00,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:38:00,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:38:00,137 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_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2022-11-20 10:38:00,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:38:00,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:38:00,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:38:00,459 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:38:00,460 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:38:00,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-20 10:38:03,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:38:03,785 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:38:03,785 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-20 10:38:03,792 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/data/93951a7ea/d828a3745c5542dc87d296ab961e40bc/FLAGccf8be134 [2022-11-20 10:38:03,810 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/data/93951a7ea/d828a3745c5542dc87d296ab961e40bc [2022-11-20 10:38:03,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:38:03,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:38:03,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:03,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:38:03,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:38:03,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:03" (1/1) ... [2022-11-20 10:38:03,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b33243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:03, skipping insertion in model container [2022-11-20 10:38:03,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:03" (1/1) ... [2022-11-20 10:38:03,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:38:03,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:38:03,978 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-20 10:38:03,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:04,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:38:04,016 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-20 10:38:04,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:04,034 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:38:04,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04 WrapperNode [2022-11-20 10:38:04,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:04,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:04,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:38:04,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:38:04,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,065 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-11-20 10:38:04,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:04,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:38:04,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:38:04,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:38:04,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,086 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:38:04,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:38:04,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:38:04,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:38:04,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (1/1) ... [2022-11-20 10:38:04,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:04,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:38:04,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:38:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:38:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:38:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:38:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:38:04,260 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:38:04,263 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:38:04,489 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:38:04,496 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:38:04,496 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 10:38:04,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:04 BoogieIcfgContainer [2022-11-20 10:38:04,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:38:04,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:38:04,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:38:04,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:38:04,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:38:03" (1/3) ... [2022-11-20 10:38:04,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e282bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:04, skipping insertion in model container [2022-11-20 10:38:04,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:04" (2/3) ... [2022-11-20 10:38:04,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e282bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:04, skipping insertion in model container [2022-11-20 10:38:04,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:04" (3/3) ... [2022-11-20 10:38:04,508 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-11-20 10:38:04,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:38:04,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:38:04,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:04,623 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;@1d497339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:04,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:38:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:38:04,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:04,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:04,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-11-20 10:38:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:04,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950062236] [2022-11-20 10:38:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950062236] [2022-11-20 10:38:04,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950062236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:04,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:04,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778350319] [2022-11-20 10:38:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:04,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:04,868 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:04,881 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-20 10:38:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:04,883 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:38:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:04,891 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:38:04,891 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 10:38:04,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:04,898 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:04,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 10:38:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-20 10:38:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-20 10:38:04,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-11-20 10:38:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:04,934 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-20 10:38:04,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-20 10:38:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:38:04,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:04,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:04,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:38:04,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-11-20 10:38:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:04,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722815091] [2022-11-20 10:38:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722815091] [2022-11-20 10:38:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722815091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:05,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:38:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070781984] [2022-11-20 10:38:05,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:05,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:05,312 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:05,407 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-20 10:38:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:38:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:05,409 INFO L225 Difference]: With dead ends: 27 [2022-11-20 10:38:05,409 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 10:38:05,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:05,411 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 10:38:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 10:38:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-11-20 10:38:05,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2022-11-20 10:38:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,432 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-11-20 10:38:05,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-11-20 10:38:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:38:05,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:38:05,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-11-20 10:38:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459279089] [2022-11-20 10:38:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:05,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:05,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459279089] [2022-11-20 10:38:05,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459279089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:05,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:05,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996499079] [2022-11-20 10:38:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:05,478 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:05,518 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-11-20 10:38:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-11-20 10:38:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:05,520 INFO L225 Difference]: With dead ends: 28 [2022-11-20 10:38:05,520 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 10:38:05,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:05,522 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:05,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 10:38:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 10:38:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-11-20 10:38:05,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2022-11-20 10:38:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,543 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-11-20 10:38:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-11-20 10:38:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:38:05,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:05,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:38:05,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-11-20 10:38:05,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138595862] [2022-11-20 10:38:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138595862] [2022-11-20 10:38:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138595862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:05,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:05,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:05,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619998712] [2022-11-20 10:38:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:05,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:05,637 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:05,689 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2022-11-20 10:38:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-11-20 10:38:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:05,694 INFO L225 Difference]: With dead ends: 37 [2022-11-20 10:38:05,694 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 10:38:05,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:05,696 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:05,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 10:38:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 10:38:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-20 10:38:05,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2022-11-20 10:38:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,722 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-20 10:38:05,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-20 10:38:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:05,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:38:05,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2022-11-20 10:38:05,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346353262] [2022-11-20 10:38:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346353262] [2022-11-20 10:38:05,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346353262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:05,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:05,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:38:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594518035] [2022-11-20 10:38:05,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:05,878 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:05,934 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-20 10:38:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:05,937 INFO L225 Difference]: With dead ends: 34 [2022-11-20 10:38:05,937 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 10:38:05,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:05,941 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:05,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 10:38:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 10:38:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2022-11-20 10:38:05,959 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2022-11-20 10:38:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,960 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2022-11-20 10:38:05,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2022-11-20 10:38:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:38:05,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:05,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:38:05,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2022-11-20 10:38:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612183441] [2022-11-20 10:38:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612183441] [2022-11-20 10:38:06,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612183441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257565095] [2022-11-20 10:38:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:06,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:06,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:38:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257565095] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:06,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:06,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-11-20 10:38:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465514720] [2022-11-20 10:38:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:06,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:06,380 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:06,440 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-11-20 10:38:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 14 [2022-11-20 10:38:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:06,444 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:38:06,444 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 10:38:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:06,451 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:06,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 10:38:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-20 10:38:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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) [2022-11-20 10:38:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-11-20 10:38:06,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2022-11-20 10:38:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:06,465 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-11-20 10:38:06,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-11-20 10:38:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:38:06,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:06,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:06,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:06,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2022-11-20 10:38:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:06,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300031680] [2022-11-20 10:38:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:06,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300031680] [2022-11-20 10:38:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300031680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:06,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634138463] [2022-11-20 10:38:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:06,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:06,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:38:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:06,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:06,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634138463] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:06,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:06,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2022-11-20 10:38:06,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582423597] [2022-11-20 10:38:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:06,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:06,899 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:06,936 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-20 10:38:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 14 [2022-11-20 10:38:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:06,938 INFO L225 Difference]: With dead ends: 24 [2022-11-20 10:38:06,938 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 10:38:06,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:06,940 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:06,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 10:38:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 10:38:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-20 10:38:06,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2022-11-20 10:38:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:06,956 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-20 10:38:06,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-20 10:38:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:38:06,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:06,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:06,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2022-11-20 10:38:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:07,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055446673] [2022-11-20 10:38:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:07,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055446673] [2022-11-20 10:38:07,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055446673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451877076] [2022-11-20 10:38:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:07,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:07,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:38:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:38:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:07,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:07,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451877076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:07,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:07,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 10:38:07,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252548232] [2022-11-20 10:38:07,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:07,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:07,438 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:07,468 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-20 10:38:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:07,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 15 [2022-11-20 10:38:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:07,469 INFO L225 Difference]: With dead ends: 27 [2022-11-20 10:38:07,470 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 10:38:07,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:07,471 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:07,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 10:38:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 10:38:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-20 10:38:07,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2022-11-20 10:38:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:07,479 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-20 10:38:07,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-20 10:38:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:38:07,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:07,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:07,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:38:07,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2022-11-20 10:38:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370545788] [2022-11-20 10:38:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370545788] [2022-11-20 10:38:07,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370545788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782663122] [2022-11-20 10:38:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:07,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:07,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:38:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:38:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:08,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782663122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:08,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-20 10:38:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142789509] [2022-11-20 10:38:08,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:08,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:38:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:38:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:38:08,150 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:08,414 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2022-11-20 10:38:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:38:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 15 [2022-11-20 10:38:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:08,417 INFO L225 Difference]: With dead ends: 66 [2022-11-20 10:38:08,417 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 10:38:08,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:38:08,418 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:08,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 57 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 10:38:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-11-20 10:38:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-20 10:38:08,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2022-11-20 10:38:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:08,453 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-20 10:38:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-20 10:38:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:38:08,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:08,454 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:08,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:08,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:08,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 1 times [2022-11-20 10:38:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783058726] [2022-11-20 10:38:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:08,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783058726] [2022-11-20 10:38:08,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783058726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656623176] [2022-11-20 10:38:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:08,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:08,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:38:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:38:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:08,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:08,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656623176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:08,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:08,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 10:38:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992652595] [2022-11-20 10:38:08,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:08,941 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:08,983 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-11-20 10:38:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-11-20 10:38:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:08,985 INFO L225 Difference]: With dead ends: 46 [2022-11-20 10:38:08,985 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 10:38:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:08,986 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:08,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 10:38:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 10:38:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-20 10:38:09,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 17 [2022-11-20 10:38:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:09,005 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-20 10:38:09,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-20 10:38:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:38:09,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:09,006 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:09,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:09,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1535262302, now seen corresponding path program 2 times [2022-11-20 10:38:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:09,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153054152] [2022-11-20 10:38:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:09,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153054152] [2022-11-20 10:38:09,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153054152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:09,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613436765] [2022-11-20 10:38:09,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:09,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:09,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:09,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:38:09,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:09,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:38:09,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:09,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:09,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613436765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:09,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:09,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-20 10:38:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233234692] [2022-11-20 10:38:09,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:38:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:38:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:38:09,593 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:09,957 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2022-11-20 10:38:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:38:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 17 [2022-11-20 10:38:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:09,958 INFO L225 Difference]: With dead ends: 84 [2022-11-20 10:38:09,958 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 10:38:09,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:38:09,959 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:09,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 90 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:38:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 10:38:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-11-20 10:38:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2022-11-20 10:38:09,982 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 17 [2022-11-20 10:38:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:09,983 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2022-11-20 10:38:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2022-11-20 10:38:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:38:09,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:09,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:09,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:10,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:38:10,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2022-11-20 10:38:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:10,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649915414] [2022-11-20 10:38:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649915414] [2022-11-20 10:38:10,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649915414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805077727] [2022-11-20 10:38:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:10,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:10,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:10,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:10,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:38:10,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:38:10,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:38:10,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805077727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:10,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:10,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-20 10:38:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373522996] [2022-11-20 10:38:10,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:10,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:38:10,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:38:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:38:10,511 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:11,042 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2022-11-20 10:38:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:38:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 18 [2022-11-20 10:38:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:11,044 INFO L225 Difference]: With dead ends: 77 [2022-11-20 10:38:11,044 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 10:38:11,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:38:11,045 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:11,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 64 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:38:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 10:38:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-11-20 10:38:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-11-20 10:38:11,071 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2022-11-20 10:38:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:11,071 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-11-20 10:38:11,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-11-20 10:38:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:38:11,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:11,072 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:11,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:11,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:38:11,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1913455152, now seen corresponding path program 3 times [2022-11-20 10:38:11,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894751978] [2022-11-20 10:38:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:11,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:38:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:11,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894751978] [2022-11-20 10:38:11,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894751978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:11,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636795233] [2022-11-20 10:38:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:11,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:11,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:11,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:11,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:38:11,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:11,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:38:11,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:38:11,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:38:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636795233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:11,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:11,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 19 [2022-11-20 10:38:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070266341] [2022-11-20 10:38:11,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:11,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:38:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:38:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:38:11,839 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:13,725 INFO L93 Difference]: Finished difference Result 137 states and 189 transitions. [2022-11-20 10:38:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 10:38:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 10:38:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:13,727 INFO L225 Difference]: With dead ends: 137 [2022-11-20 10:38:13,728 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 10:38:13,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:38:13,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:13,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 199 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:38:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 10:38:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2022-11-20 10:38:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2022-11-20 10:38:13,808 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 19 [2022-11-20 10:38:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:13,808 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2022-11-20 10:38:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2022-11-20 10:38:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:38:13,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:13,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:13,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 10:38:14,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:38:14,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 4 times [2022-11-20 10:38:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452413196] [2022-11-20 10:38:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:14,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:14,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452413196] [2022-11-20 10:38:14,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452413196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:14,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889020318] [2022-11-20 10:38:14,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:14,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:14,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:14,152 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:14,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:38:14,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:14,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:14,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889020318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:14,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:14,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-20 10:38:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755703538] [2022-11-20 10:38:14,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:14,320 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:14,412 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2022-11-20 10:38:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:38:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 20 [2022-11-20 10:38:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:14,413 INFO L225 Difference]: With dead ends: 82 [2022-11-20 10:38:14,414 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 10:38:14,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:14,415 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 10:38:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-20 10:38:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2022-11-20 10:38:14,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 20 [2022-11-20 10:38:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:14,452 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2022-11-20 10:38:14,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2022-11-20 10:38:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:38:14,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:14,453 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:14,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:14,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:38:14,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1336926662, now seen corresponding path program 3 times [2022-11-20 10:38:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861823999] [2022-11-20 10:38:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:14,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:14,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861823999] [2022-11-20 10:38:14,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861823999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747955595] [2022-11-20 10:38:14,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:14,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:14,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:14,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:38:14,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:38:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:15,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747955595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:15,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:15,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-20 10:38:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548557752] [2022-11-20 10:38:15,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:15,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:38:15,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:38:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:38:15,109 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:16,454 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2022-11-20 10:38:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:38:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 20 [2022-11-20 10:38:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:16,455 INFO L225 Difference]: With dead ends: 164 [2022-11-20 10:38:16,455 INFO L226 Difference]: Without dead ends: 136 [2022-11-20 10:38:16,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:38:16,457 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:16,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 181 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:38:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-20 10:38:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2022-11-20 10:38:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 92 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2022-11-20 10:38:16,521 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 20 [2022-11-20 10:38:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:16,521 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2022-11-20 10:38:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2022-11-20 10:38:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:38:16,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:16,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:16,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:38:16,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1458344336, now seen corresponding path program 2 times [2022-11-20 10:38:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429972046] [2022-11-20 10:38:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429972046] [2022-11-20 10:38:16,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429972046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580708195] [2022-11-20 10:38:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:16,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:16,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:38:17,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:17,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:17,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:17,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580708195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:17,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:17,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-20 10:38:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748603094] [2022-11-20 10:38:17,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:38:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:38:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:38:17,163 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:18,699 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2022-11-20 10:38:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 10:38:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 21 [2022-11-20 10:38:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:18,701 INFO L225 Difference]: With dead ends: 133 [2022-11-20 10:38:18,701 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 10:38:18,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 10:38:18,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:18,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 43 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:38:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 10:38:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-11-20 10:38:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 81 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2022-11-20 10:38:18,745 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 21 [2022-11-20 10:38:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:18,745 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2022-11-20 10:38:18,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2022-11-20 10:38:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 10:38:18,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:18,748 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:18,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:38:18,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 5 times [2022-11-20 10:38:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381258120] [2022-11-20 10:38:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:38:19,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381258120] [2022-11-20 10:38:19,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381258120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604780154] [2022-11-20 10:38:19,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:19,170 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:19,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:38:19,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:38:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:38:19,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:38:19,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604780154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:19,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:19,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-20 10:38:19,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828334781] [2022-11-20 10:38:19,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:19,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:38:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:38:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:19,325 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:19,440 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-11-20 10:38:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:38:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 10:38:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:19,442 INFO L225 Difference]: With dead ends: 104 [2022-11-20 10:38:19,442 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 10:38:19,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:19,443 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:19,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 10:38:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-20 10:38:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 79 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2022-11-20 10:38:19,498 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 22 [2022-11-20 10:38:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:19,498 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2022-11-20 10:38:19,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2022-11-20 10:38:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 10:38:19,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:19,499 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:19,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 10:38:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:19,705 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 181444187, now seen corresponding path program 6 times [2022-11-20 10:38:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238324537] [2022-11-20 10:38:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:38:19,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238324537] [2022-11-20 10:38:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238324537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387790325] [2022-11-20 10:38:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:19,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:19,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:19,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:38:19,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:38:19,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 10:38:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 10:38:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387790325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:20,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:20,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2022-11-20 10:38:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068341169] [2022-11-20 10:38:20,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:38:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:38:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:38:20,099 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:20,810 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2022-11-20 10:38:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:38:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 22 [2022-11-20 10:38:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:20,812 INFO L225 Difference]: With dead ends: 206 [2022-11-20 10:38:20,812 INFO L226 Difference]: Without dead ends: 173 [2022-11-20 10:38:20,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:38:20,813 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:20,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 301 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:38:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-20 10:38:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2022-11-20 10:38:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2022-11-20 10:38:20,851 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 22 [2022-11-20 10:38:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2022-11-20 10:38:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2022-11-20 10:38:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:38:20,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:20,853 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:20,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:38:21,059 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 534298912, now seen corresponding path program 3 times [2022-11-20 10:38:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815095437] [2022-11-20 10:38:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:38:21,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:21,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815095437] [2022-11-20 10:38:21,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815095437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522888779] [2022-11-20 10:38:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:21,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:21,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:21,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:38:21,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:38:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:38:21,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:38:21,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522888779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:21,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:21,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 26 [2022-11-20 10:38:21,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724009907] [2022-11-20 10:38:21,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:21,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:38:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:38:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:38:21,798 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:25,775 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2022-11-20 10:38:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 10:38:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 23 [2022-11-20 10:38:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:25,779 INFO L225 Difference]: With dead ends: 227 [2022-11-20 10:38:25,779 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 10:38:25,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 10:38:25,782 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:25,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 469 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:38:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 10:38:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 107. [2022-11-20 10:38:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2022-11-20 10:38:25,833 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 23 [2022-11-20 10:38:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:25,834 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2022-11-20 10:38:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2022-11-20 10:38:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:38:25,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:25,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:25,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:26,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2022-11-20 10:38:26,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264030398] [2022-11-20 10:38:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264030398] [2022-11-20 10:38:26,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264030398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461457397] [2022-11-20 10:38:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:26,338 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:26,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:38:26,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:26,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:38:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:26,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:26,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461457397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:26,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:26,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-20 10:38:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220707127] [2022-11-20 10:38:26,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:38:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:38:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:38:26,580 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:30,153 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2022-11-20 10:38:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 10:38:30,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 24 [2022-11-20 10:38:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:30,155 INFO L225 Difference]: With dead ends: 212 [2022-11-20 10:38:30,155 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 10:38:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 10:38:30,157 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 188 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 83 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:38:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 10:38:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2022-11-20 10:38:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3555555555555556) internal successors, (183), 135 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2022-11-20 10:38:30,202 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 24 [2022-11-20 10:38:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:30,202 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2022-11-20 10:38:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2022-11-20 10:38:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:38:30,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:30,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:30,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 10:38:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-20 10:38:30,407 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 7 times [2022-11-20 10:38:30,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:30,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076720489] [2022-11-20 10:38:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:38:30,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:30,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076720489] [2022-11-20 10:38:30,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076720489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493815771] [2022-11-20 10:38:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:38:30,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:30,551 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:30,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:38:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:38:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:38:30,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:38:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493815771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:30,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:30,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-20 10:38:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794611168] [2022-11-20 10:38:30,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:38:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:38:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:30,730 INFO L87 Difference]: Start difference. First operand 136 states and 183 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:30,894 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2022-11-20 10:38:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 10:38:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:30,896 INFO L225 Difference]: With dead ends: 151 [2022-11-20 10:38:30,896 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 10:38:30,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:30,897 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:30,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 10:38:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-20 10:38:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 137 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2022-11-20 10:38:30,963 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 25 [2022-11-20 10:38:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:30,963 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2022-11-20 10:38:30,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2022-11-20 10:38:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:38:30,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:30,965 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:30,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:31,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 10:38:31,170 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -779130386, now seen corresponding path program 4 times [2022-11-20 10:38:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:31,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450147567] [2022-11-20 10:38:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:31,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:38:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450147567] [2022-11-20 10:38:31,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450147567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348660760] [2022-11-20 10:38:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:31,403 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:31,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:38:31,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:31,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:31,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:38:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:38:31,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:38:31,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348660760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:31,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:31,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2022-11-20 10:38:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649051430] [2022-11-20 10:38:31,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:38:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:31,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:38:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:38:31,734 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:33,686 INFO L93 Difference]: Finished difference Result 310 states and 409 transitions. [2022-11-20 10:38:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 10:38:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 25 [2022-11-20 10:38:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:33,689 INFO L225 Difference]: With dead ends: 310 [2022-11-20 10:38:33,689 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 10:38:33,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:38:33,691 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 137 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:33,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 386 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:38:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 10:38:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 147. [2022-11-20 10:38:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 146 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2022-11-20 10:38:33,756 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 25 [2022-11-20 10:38:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:33,757 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2022-11-20 10:38:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2022-11-20 10:38:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:38:33,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:33,757 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:33,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:33,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:33,958 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 5 times [2022-11-20 10:38:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452078826] [2022-11-20 10:38:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:33,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:38:34,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:34,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452078826] [2022-11-20 10:38:34,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452078826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:34,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408803655] [2022-11-20 10:38:34,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:34,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:34,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:34,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:34,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:38:34,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:38:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:34,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 10:38:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:38:34,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:38:34,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408803655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:34,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2022-11-20 10:38:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888516848] [2022-11-20 10:38:34,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:38:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:38:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:38:34,942 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:38,453 INFO L93 Difference]: Finished difference Result 289 states and 378 transitions. [2022-11-20 10:38:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 10:38:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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 [2022-11-20 10:38:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:38,455 INFO L225 Difference]: With dead ends: 289 [2022-11-20 10:38:38,455 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 10:38:38,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 10:38:38,457 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:38,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 380 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:38:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 10:38:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 151. [2022-11-20 10:38:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-11-20 10:38:38,535 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 26 [2022-11-20 10:38:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-11-20 10:38:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-11-20 10:38:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:38:38,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:38,536 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:38,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:38,737 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 8 times [2022-11-20 10:38:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926973165] [2022-11-20 10:38:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:38:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926973165] [2022-11-20 10:38:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926973165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249833249] [2022-11-20 10:38:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:38,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:38,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:38,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:38:39,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:39,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:38:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:38:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249833249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:39,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-11-20 10:38:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922882850] [2022-11-20 10:38:39,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:39,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:38:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:38:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:39,135 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:39,308 INFO L93 Difference]: Finished difference Result 191 states and 258 transitions. [2022-11-20 10:38:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 27 [2022-11-20 10:38:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:39,309 INFO L225 Difference]: With dead ends: 191 [2022-11-20 10:38:39,309 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 10:38:39,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:39,312 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:39,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 10:38:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2022-11-20 10:38:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3333333333333333) internal successors, (184), 138 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2022-11-20 10:38:39,399 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 27 [2022-11-20 10:38:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:39,399 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2022-11-20 10:38:39,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2022-11-20 10:38:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:38:39,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:39,402 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:39,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-20 10:38:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:39,607 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2022-11-20 10:38:39,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:39,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328526640] [2022-11-20 10:38:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328526640] [2022-11-20 10:38:39,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328526640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914743740] [2022-11-20 10:38:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:39,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:40,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:38:40,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:38:40,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 10:38:40,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:40,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:38:40,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914743740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:40,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:40,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2022-11-20 10:38:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298749145] [2022-11-20 10:38:40,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:38:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:38:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:38:40,903 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:44,254 INFO L93 Difference]: Finished difference Result 328 states and 490 transitions. [2022-11-20 10:38:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 10:38:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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 27 [2022-11-20 10:38:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:44,256 INFO L225 Difference]: With dead ends: 328 [2022-11-20 10:38:44,256 INFO L226 Difference]: Without dead ends: 291 [2022-11-20 10:38:44,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 10:38:44,258 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 295 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:44,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 271 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:38:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-20 10:38:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2022-11-20 10:38:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 168 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 233 transitions. [2022-11-20 10:38:44,373 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 233 transitions. Word has length 27 [2022-11-20 10:38:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:44,374 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 233 transitions. [2022-11-20 10:38:44,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 233 transitions. [2022-11-20 10:38:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:38:44,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:44,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:44,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:44,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,581 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash -329349222, now seen corresponding path program 9 times [2022-11-20 10:38:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741097640] [2022-11-20 10:38:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 10:38:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:44,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741097640] [2022-11-20 10:38:44,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741097640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:44,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291260407] [2022-11-20 10:38:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:44,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:44,879 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:44,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:38:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:38:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:38:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:38:45,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:38:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291260407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:45,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-20 10:38:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533073008] [2022-11-20 10:38:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:38:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:38:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:38:45,185 INFO L87 Difference]: Start difference. First operand 169 states and 233 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:45,599 INFO L93 Difference]: Finished difference Result 213 states and 296 transitions. [2022-11-20 10:38:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:38:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 28 [2022-11-20 10:38:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:45,601 INFO L225 Difference]: With dead ends: 213 [2022-11-20 10:38:45,602 INFO L226 Difference]: Without dead ends: 196 [2022-11-20 10:38:45,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:38:45,603 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:45,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 79 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:38:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-20 10:38:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-20 10:38:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.3692307692307693) internal successors, (267), 195 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 267 transitions. [2022-11-20 10:38:45,783 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 267 transitions. Word has length 28 [2022-11-20 10:38:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:45,783 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 267 transitions. [2022-11-20 10:38:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 267 transitions. [2022-11-20 10:38:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:38:45,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:45,785 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:38:45,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1297921274, now seen corresponding path program 6 times [2022-11-20 10:38:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:45,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992874029] [2022-11-20 10:38:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:38:46,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:46,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992874029] [2022-11-20 10:38:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992874029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002108629] [2022-11-20 10:38:46,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:46,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:46,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:46,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:38:46,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 10:38:46,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:38:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:38:46,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:38:46,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002108629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:46,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:46,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 23 [2022-11-20 10:38:46,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087820123] [2022-11-20 10:38:46,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:46,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:38:46,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:38:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:38:46,741 INFO L87 Difference]: Start difference. First operand 196 states and 267 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:53,484 INFO L93 Difference]: Finished difference Result 401 states and 544 transitions. [2022-11-20 10:38:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 10:38:53,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 28 [2022-11-20 10:38:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:53,486 INFO L225 Difference]: With dead ends: 401 [2022-11-20 10:38:53,486 INFO L226 Difference]: Without dead ends: 316 [2022-11-20 10:38:53,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=697, Invalid=6443, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 10:38:53,489 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 223 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:53,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 519 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 10:38:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-20 10:38:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 206. [2022-11-20 10:38:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3365853658536586) internal successors, (274), 205 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 274 transitions. [2022-11-20 10:38:53,608 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 274 transitions. Word has length 28 [2022-11-20 10:38:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:53,609 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 274 transitions. [2022-11-20 10:38:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 274 transitions. [2022-11-20 10:38:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:38:53,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:53,610 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:53,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:53,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 10:38:53,817 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 405263290, now seen corresponding path program 6 times [2022-11-20 10:38:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022540930] [2022-11-20 10:38:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:53,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:38:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022540930] [2022-11-20 10:38:54,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022540930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18700073] [2022-11-20 10:38:54,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:54,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:54,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:54,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:54,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:38:54,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:38:54,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 10:38:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:38:54,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:38:54,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18700073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:54,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:54,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-11-20 10:38:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818408037] [2022-11-20 10:38:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:54,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:38:54,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:38:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:38:54,827 INFO L87 Difference]: Start difference. First operand 206 states and 274 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:00,979 INFO L93 Difference]: Finished difference Result 348 states and 449 transitions. [2022-11-20 10:39:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 10:39:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 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 30 [2022-11-20 10:39:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:00,981 INFO L225 Difference]: With dead ends: 348 [2022-11-20 10:39:00,981 INFO L226 Difference]: Without dead ends: 294 [2022-11-20 10:39:00,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=511, Invalid=3911, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 10:39:00,983 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 158 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:00,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 647 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 10:39:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-20 10:39:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 198. [2022-11-20 10:39:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.3248730964467006) internal successors, (261), 197 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 261 transitions. [2022-11-20 10:39:01,091 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 261 transitions. Word has length 30 [2022-11-20 10:39:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:01,092 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 261 transitions. [2022-11-20 10:39:01,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 261 transitions. [2022-11-20 10:39:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:39:01,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:01,093 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:01,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 10:39:01,293 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1895449321, now seen corresponding path program 7 times [2022-11-20 10:39:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181426152] [2022-11-20 10:39:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:01,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181426152] [2022-11-20 10:39:01,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181426152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023827064] [2022-11-20 10:39:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:39:01,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:01,741 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:01,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:39:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:39:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:39:02,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:39:02,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023827064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:02,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:02,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-20 10:39:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550223992] [2022-11-20 10:39:02,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:39:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:39:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:39:02,097 INFO L87 Difference]: Start difference. First operand 198 states and 261 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-11-20 10:39:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:21,505 INFO L93 Difference]: Finished difference Result 326 states and 448 transitions. [2022-11-20 10:39:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-20 10:39:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2022-11-20 10:39:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:21,506 INFO L225 Difference]: With dead ends: 326 [2022-11-20 10:39:21,506 INFO L226 Difference]: Without dead ends: 285 [2022-11-20 10:39:21,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2022-11-20 10:39:21,510 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 252 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:21,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 159 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 10:39:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-20 10:39:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 214. [2022-11-20 10:39:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3145539906103287) internal successors, (280), 213 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 280 transitions. [2022-11-20 10:39:21,636 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 280 transitions. Word has length 30 [2022-11-20 10:39:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:21,636 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 280 transitions. [2022-11-20 10:39:21,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-11-20 10:39:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 280 transitions. [2022-11-20 10:39:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:39:21,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:21,638 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:21,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 10:39:21,842 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash 425527099, now seen corresponding path program 10 times [2022-11-20 10:39:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:21,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664790203] [2022-11-20 10:39:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:39:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664790203] [2022-11-20 10:39:22,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664790203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707273317] [2022-11-20 10:39:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:39:22,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:22,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:22,183 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:22,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:39:22,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:39:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:39:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:39:22,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 10:39:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707273317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:22,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:22,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2022-11-20 10:39:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145324650] [2022-11-20 10:39:22,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:39:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:39:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:39:22,641 INFO L87 Difference]: Start difference. First operand 214 states and 280 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:24,548 INFO L93 Difference]: Finished difference Result 567 states and 739 transitions. [2022-11-20 10:39:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 10:39:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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 30 [2022-11-20 10:39:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:24,551 INFO L225 Difference]: With dead ends: 567 [2022-11-20 10:39:24,551 INFO L226 Difference]: Without dead ends: 489 [2022-11-20 10:39:24,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:39:24,552 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 323 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:24,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 699 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:39:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-20 10:39:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 226. [2022-11-20 10:39:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.2977777777777777) internal successors, (292), 225 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 292 transitions. [2022-11-20 10:39:24,695 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 292 transitions. Word has length 30 [2022-11-20 10:39:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:24,696 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 292 transitions. [2022-11-20 10:39:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 292 transitions. [2022-11-20 10:39:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:39:24,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:24,697 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:24,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-20 10:39:24,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:24,903 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash 268339482, now seen corresponding path program 11 times [2022-11-20 10:39:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:24,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533507204] [2022-11-20 10:39:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:39:25,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533507204] [2022-11-20 10:39:25,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533507204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119253812] [2022-11-20 10:39:25,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:39:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:25,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 10:39:25,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:39:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:39:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:39:25,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:39:25,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119253812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:25,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:25,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-11-20 10:39:25,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776570783] [2022-11-20 10:39:25,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:25,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:39:25,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:25,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:39:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:39:25,769 INFO L87 Difference]: Start difference. First operand 226 states and 292 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:29,122 INFO L93 Difference]: Finished difference Result 479 states and 688 transitions. [2022-11-20 10:39:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 10:39:29,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 32 [2022-11-20 10:39:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:29,125 INFO L225 Difference]: With dead ends: 479 [2022-11-20 10:39:29,125 INFO L226 Difference]: Without dead ends: 435 [2022-11-20 10:39:29,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=406, Invalid=1316, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:39:29,127 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:29,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 99 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:39:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-20 10:39:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 381. [2022-11-20 10:39:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.394736842105263) internal successors, (530), 380 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 530 transitions. [2022-11-20 10:39:29,488 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 530 transitions. Word has length 32 [2022-11-20 10:39:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:29,488 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 530 transitions. [2022-11-20 10:39:29,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 530 transitions. [2022-11-20 10:39:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:39:29,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:29,490 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:29,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:29,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:29,698 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash -675287733, now seen corresponding path program 12 times [2022-11-20 10:39:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:29,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795825164] [2022-11-20 10:39:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:39:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795825164] [2022-11-20 10:39:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795825164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121009550] [2022-11-20 10:39:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:39:30,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:30,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:30,103 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:30,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 10:39:30,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 10:39:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 10:39:30,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:39:30,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 10:39:31,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121009550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:31,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:31,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 15] total 38 [2022-11-20 10:39:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65820209] [2022-11-20 10:39:31,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:31,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:39:31,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:39:31,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:39:31,363 INFO L87 Difference]: Start difference. First operand 381 states and 530 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:46,661 INFO L93 Difference]: Finished difference Result 914 states and 1294 transitions. [2022-11-20 10:39:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-20 10:39:46,661 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 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 32 [2022-11-20 10:39:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:46,663 INFO L225 Difference]: With dead ends: 914 [2022-11-20 10:39:46,663 INFO L226 Difference]: Without dead ends: 743 [2022-11-20 10:39:46,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6624 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=2440, Invalid=20512, Unknown=0, NotChecked=0, Total=22952 [2022-11-20 10:39:46,666 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 204 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:46,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1002 Invalid, 3612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:39:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-11-20 10:39:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 472. [2022-11-20 10:39:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.4416135881104033) internal successors, (679), 471 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 679 transitions. [2022-11-20 10:39:46,953 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 679 transitions. Word has length 32 [2022-11-20 10:39:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:46,954 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 679 transitions. [2022-11-20 10:39:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 679 transitions. [2022-11-20 10:39:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 10:39:46,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:46,955 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:46,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:47,156 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash -586196048, now seen corresponding path program 7 times [2022-11-20 10:39:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992072071] [2022-11-20 10:39:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:47,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:39:47,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992072071] [2022-11-20 10:39:47,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992072071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674331992] [2022-11-20 10:39:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:39:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:47,607 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:47,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 10:39:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 10:39:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:39:47,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 10:39:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674331992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:48,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:48,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 10] total 30 [2022-11-20 10:39:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568457136] [2022-11-20 10:39:48,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:39:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:39:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:39:48,236 INFO L87 Difference]: Start difference. First operand 472 states and 679 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:54,858 INFO L93 Difference]: Finished difference Result 975 states and 1401 transitions. [2022-11-20 10:39:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 10:39:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 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 33 [2022-11-20 10:39:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:54,861 INFO L225 Difference]: With dead ends: 975 [2022-11-20 10:39:54,862 INFO L226 Difference]: Without dead ends: 794 [2022-11-20 10:39:54,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=644, Invalid=7546, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 10:39:54,864 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 170 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:54,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 996 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:39:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-20 10:39:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 554. [2022-11-20 10:39:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.383363471971067) internal successors, (765), 553 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 765 transitions. [2022-11-20 10:39:55,200 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 765 transitions. Word has length 33 [2022-11-20 10:39:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:55,201 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 765 transitions. [2022-11-20 10:39:55,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 765 transitions. [2022-11-20 10:39:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:39:55,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:55,202 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:55,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:55,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 10:39:55,408 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1550999073, now seen corresponding path program 8 times [2022-11-20 10:39:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586903854] [2022-11-20 10:39:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:39:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586903854] [2022-11-20 10:39:55,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586903854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657361512] [2022-11-20 10:39:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:55,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:55,798 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:55,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 10:39:55,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 10:39:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:39:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:39:56,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657361512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:56,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:56,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2022-11-20 10:39:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029266021] [2022-11-20 10:39:56,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:39:56,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:39:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:39:56,962 INFO L87 Difference]: Start difference. First operand 554 states and 765 transitions. Second operand has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:27,569 INFO L93 Difference]: Finished difference Result 1554 states and 2105 transitions. [2022-11-20 10:40:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-11-20 10:40:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 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 35 [2022-11-20 10:40:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:27,574 INFO L225 Difference]: With dead ends: 1554 [2022-11-20 10:40:27,574 INFO L226 Difference]: Without dead ends: 1324 [2022-11-20 10:40:27,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24190 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=6620, Invalid=55132, Unknown=0, NotChecked=0, Total=61752 [2022-11-20 10:40:27,581 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 849 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 502 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 10:40:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-20 10:40:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 772. [2022-11-20 10:40:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.383916990920882) internal successors, (1067), 771 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1067 transitions. [2022-11-20 10:40:28,252 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1067 transitions. Word has length 35 [2022-11-20 10:40:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:28,253 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1067 transitions. [2022-11-20 10:40:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1067 transitions. [2022-11-20 10:40:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:40:28,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:28,258 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:28,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:28,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:28,463 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash 794730143, now seen corresponding path program 13 times [2022-11-20 10:40:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748950732] [2022-11-20 10:40:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:40:28,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:28,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748950732] [2022-11-20 10:40:28,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748950732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:40:28,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362118012] [2022-11-20 10:40:28,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:40:28,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:28,978 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:28,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 10:40:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:40:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 10:40:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 10:40:29,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362118012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:29,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:40:29,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 12 [2022-11-20 10:40:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360119305] [2022-11-20 10:40:29,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:29,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:40:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:29,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:40:29,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:29,197 INFO L87 Difference]: Start difference. First operand 772 states and 1067 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:30,223 INFO L93 Difference]: Finished difference Result 891 states and 1211 transitions. [2022-11-20 10:40:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:40:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 10:40:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:30,229 INFO L225 Difference]: With dead ends: 891 [2022-11-20 10:40:30,229 INFO L226 Difference]: Without dead ends: 857 [2022-11-20 10:40:30,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:30,230 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:30,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:40:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-20 10:40:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 758. [2022-11-20 10:40:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.3883751651254954) internal successors, (1051), 757 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1051 transitions. [2022-11-20 10:40:30,782 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1051 transitions. Word has length 37 [2022-11-20 10:40:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:30,783 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1051 transitions. [2022-11-20 10:40:30,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1051 transitions. [2022-11-20 10:40:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:40:30,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:30,785 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:30,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:30,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 10:40:30,992 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 364300559, now seen corresponding path program 9 times [2022-11-20 10:40:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:30,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625289761] [2022-11-20 10:40:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 10:40:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625289761] [2022-11-20 10:40:31,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625289761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:40:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487726412] [2022-11-20 10:40:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:40:31,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:31,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:31,524 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:31,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 10:40:31,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 10:40:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:40:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 10:40:32,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 10:40:32,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487726412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:32,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:40:32,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 38 [2022-11-20 10:40:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123602307] [2022-11-20 10:40:32,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:40:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:40:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:40:32,544 INFO L87 Difference]: Start difference. First operand 758 states and 1051 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:48,668 INFO L93 Difference]: Finished difference Result 1643 states and 2501 transitions. [2022-11-20 10:40:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-20 10:40:48,669 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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 37 [2022-11-20 10:40:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:48,674 INFO L225 Difference]: With dead ends: 1643 [2022-11-20 10:40:48,674 INFO L226 Difference]: Without dead ends: 1498 [2022-11-20 10:40:48,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4892 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=3241, Invalid=14051, Unknown=0, NotChecked=0, Total=17292 [2022-11-20 10:40:48,677 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 367 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:48,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 589 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 10:40:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-20 10:40:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 916. [2022-11-20 10:40:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4437158469945355) internal successors, (1321), 915 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1321 transitions. [2022-11-20 10:40:49,513 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1321 transitions. Word has length 37 [2022-11-20 10:40:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:49,513 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1321 transitions. [2022-11-20 10:40:49,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1321 transitions. [2022-11-20 10:40:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:40:49,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:49,516 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:49,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 10:40:49,722 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1349623750, now seen corresponding path program 10 times [2022-11-20 10:40:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:49,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979291673] [2022-11-20 10:40:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:40:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979291673] [2022-11-20 10:40:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979291673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:40:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325441284] [2022-11-20 10:40:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:40:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:50,397 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:50,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 10:40:50,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:40:50,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 10:40:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:40:50,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:40:50,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325441284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:50,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:40:50,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-11-20 10:40:50,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840737894] [2022-11-20 10:40:50,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 10:40:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 10:40:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:40:50,952 INFO L87 Difference]: Start difference. First operand 916 states and 1321 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:25,463 INFO L93 Difference]: Finished difference Result 1686 states and 2420 transitions. [2022-11-20 10:42:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-20 10:42:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 10:42:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:25,471 INFO L225 Difference]: With dead ends: 1686 [2022-11-20 10:42:25,471 INFO L226 Difference]: Without dead ends: 1419 [2022-11-20 10:42:25,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11086 ImplicationChecksByTransitivity, 82.7s TimeCoverageRelationStatistics Valid=2526, Invalid=31146, Unknown=0, NotChecked=0, Total=33672 [2022-11-20 10:42:25,473 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 453 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2995 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:25,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 817 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2995 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-20 10:42:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-11-20 10:42:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 822. [2022-11-20 10:42:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.443361753958587) internal successors, (1185), 821 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1185 transitions. [2022-11-20 10:42:26,409 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1185 transitions. Word has length 38 [2022-11-20 10:42:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:26,409 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1185 transitions. [2022-11-20 10:42:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1185 transitions. [2022-11-20 10:42:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:42:26,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:26,412 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:26,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:26,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 10:42:26,618 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1611255643, now seen corresponding path program 11 times [2022-11-20 10:42:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:26,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577528101] [2022-11-20 10:42:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:42:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:27,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577528101] [2022-11-20 10:42:27,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577528101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:27,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114567062] [2022-11-20 10:42:27,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:42:27,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:27,415 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:27,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 10:42:33,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 10:42:33,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 10:42:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 10:42:34,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 10:42:34,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114567062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:34,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 10] total 39 [2022-11-20 10:42:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704570058] [2022-11-20 10:42:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 10:42:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 10:42:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:42:34,636 INFO L87 Difference]: Start difference. First operand 822 states and 1185 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:40,493 INFO L93 Difference]: Finished difference Result 1464 states and 2079 transitions. [2022-11-20 10:42:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 10:42:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 40 [2022-11-20 10:42:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:40,497 INFO L225 Difference]: With dead ends: 1464 [2022-11-20 10:42:40,497 INFO L226 Difference]: Without dead ends: 1240 [2022-11-20 10:42:40,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1899, Invalid=9443, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 10:42:40,500 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 425 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:40,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1136 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2862 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 10:42:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-11-20 10:42:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 771. [2022-11-20 10:42:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.4181818181818182) internal successors, (1092), 770 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1092 transitions. [2022-11-20 10:42:41,151 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1092 transitions. Word has length 40 [2022-11-20 10:42:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:41,152 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1092 transitions. [2022-11-20 10:42:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1092 transitions. [2022-11-20 10:42:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 10:42:41,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:41,154 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:41,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 10:42:41,362 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1674931726, now seen corresponding path program 12 times [2022-11-20 10:42:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515415597] [2022-11-20 10:42:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 10:42:41,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515415597] [2022-11-20 10:42:41,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515415597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840623555] [2022-11-20 10:42:41,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:42:41,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:41,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:41,959 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:41,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 10:42:42,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 10:42:42,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 10:42:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 10:42:42,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 10:42:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840623555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:43,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2022-11-20 10:42:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733297920] [2022-11-20 10:42:43,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:43,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 10:42:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 10:42:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:42:43,639 INFO L87 Difference]: Start difference. First operand 771 states and 1092 transitions. Second operand has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:56,924 INFO L93 Difference]: Finished difference Result 2433 states and 3188 transitions. [2022-11-20 10:44:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 440 states. [2022-11-20 10:44:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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 41 [2022-11-20 10:44:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:56,931 INFO L225 Difference]: With dead ends: 2433 [2022-11-20 10:44:56,931 INFO L226 Difference]: Without dead ends: 2153 [2022-11-20 10:44:56,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82448 ImplicationChecksByTransitivity, 114.6s TimeCoverageRelationStatistics Valid=17220, Invalid=175940, Unknown=0, NotChecked=0, Total=193160 [2022-11-20 10:44:56,940 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1319 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 4606 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 4606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:56,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 957 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1256 Valid, 4606 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2022-11-20 10:44:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-11-20 10:44:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 989. [2022-11-20 10:44:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.3866396761133604) internal successors, (1370), 988 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1370 transitions. [2022-11-20 10:44:57,926 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1370 transitions. Word has length 41 [2022-11-20 10:44:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:57,926 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1370 transitions. [2022-11-20 10:44:57,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1370 transitions. [2022-11-20 10:44:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:44:57,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:57,929 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:57,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 10:44:58,134 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1331192646, now seen corresponding path program 14 times [2022-11-20 10:44:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:58,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325163495] [2022-11-20 10:44:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 10:44:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325163495] [2022-11-20 10:44:58,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325163495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:58,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191115484] [2022-11-20 10:44:58,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:58,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:58,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:58,722 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:58,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 10:44:58,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:44:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 10:44:58,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 10:44:58,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191115484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:58,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:58,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 14 [2022-11-20 10:44:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007100811] [2022-11-20 10:44:58,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:58,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:44:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:44:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:44:58,930 INFO L87 Difference]: Start difference. First operand 989 states and 1370 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:00,241 INFO L93 Difference]: Finished difference Result 1274 states and 1741 transitions. [2022-11-20 10:45:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 42 [2022-11-20 10:45:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:00,243 INFO L225 Difference]: With dead ends: 1274 [2022-11-20 10:45:00,244 INFO L226 Difference]: Without dead ends: 1228 [2022-11-20 10:45:00,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:45:00,245 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:00,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 107 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:45:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-11-20 10:45:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1062. [2022-11-20 10:45:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.3770028275212065) internal successors, (1461), 1061 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1461 transitions. [2022-11-20 10:45:01,081 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1461 transitions. Word has length 42 [2022-11-20 10:45:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1461 transitions. [2022-11-20 10:45:01,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1461 transitions. [2022-11-20 10:45:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:45:01,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:01,084 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:01,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 10:45:01,291 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:45:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -147614912, now seen corresponding path program 13 times [2022-11-20 10:45:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598708300] [2022-11-20 10:45:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:01,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598708300] [2022-11-20 10:45:01,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598708300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728894073] [2022-11-20 10:45:01,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:45:01,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:01,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:01,983 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:01,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 10:45:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:45:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:45:02,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:45:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728894073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:02,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:02,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2022-11-20 10:45:02,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142905071] [2022-11-20 10:45:02,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:45:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:45:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:45:02,609 INFO L87 Difference]: Start difference. First operand 1062 states and 1461 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:57,666 INFO L93 Difference]: Finished difference Result 1493 states and 2034 transitions. [2022-11-20 10:50:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-11-20 10:50:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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 43 [2022-11-20 10:50:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:57,669 INFO L225 Difference]: With dead ends: 1493 [2022-11-20 10:50:57,669 INFO L226 Difference]: Without dead ends: 1352 [2022-11-20 10:50:57,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22678 ImplicationChecksByTransitivity, 334.6s TimeCoverageRelationStatistics Valid=4127, Invalid=58122, Unknown=1, NotChecked=0, Total=62250 [2022-11-20 10:50:57,673 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 539 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 6356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:57,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 315 Invalid, 6356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 6000 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2022-11-20 10:50:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-11-20 10:50:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 969. [2022-11-20 10:50:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.375) internal successors, (1331), 968 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1331 transitions. [2022-11-20 10:50:58,493 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1331 transitions. Word has length 43 [2022-11-20 10:50:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:58,493 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1331 transitions. [2022-11-20 10:50:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1331 transitions. [2022-11-20 10:50:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 10:50:58,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:58,495 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:58,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 10:50:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:58,707 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash 24683583, now seen corresponding path program 15 times [2022-11-20 10:50:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079280791] [2022-11-20 10:50:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 10:50:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079280791] [2022-11-20 10:50:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079280791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298570157] [2022-11-20 10:50:59,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:59,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:59,072 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 10:50:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 10:50:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:50:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 10:50:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 10:50:59,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298570157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:59,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:59,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-11-20 10:50:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578805081] [2022-11-20 10:50:59,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:50:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:50:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:50:59,709 INFO L87 Difference]: Start difference. First operand 969 states and 1331 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:01,844 INFO L93 Difference]: Finished difference Result 1084 states and 1474 transitions. [2022-11-20 10:51:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:51:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 45 [2022-11-20 10:51:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:01,848 INFO L225 Difference]: With dead ends: 1084 [2022-11-20 10:51:01,848 INFO L226 Difference]: Without dead ends: 1067 [2022-11-20 10:51:01,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:51:01,849 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:01,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 95 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:51:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-11-20 10:51:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1009. [2022-11-20 10:51:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.375) internal successors, (1386), 1008 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1386 transitions. [2022-11-20 10:51:02,788 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1386 transitions. Word has length 45 [2022-11-20 10:51:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:02,788 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1386 transitions. [2022-11-20 10:51:02,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1386 transitions. [2022-11-20 10:51:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 10:51:02,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:02,789 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:02,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-20 10:51:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 10:51:02,990 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1277411425, now seen corresponding path program 16 times [2022-11-20 10:51:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:02,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064308266] [2022-11-20 10:51:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:51:03,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064308266] [2022-11-20 10:51:03,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064308266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829803839] [2022-11-20 10:51:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:03,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:03,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:03,849 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:03,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6f385c-beae-40e6-bbcf-0906cf1947fd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 10:51:03,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:51:03,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:51:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:51:04,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:51:04,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829803839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:04,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13, 13] total 40 [2022-11-20 10:51:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347814311] [2022-11-20 10:51:04,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 10:51:04,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 10:51:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:51:04,582 INFO L87 Difference]: Start difference. First operand 1009 states and 1386 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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)