./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a --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 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 --- 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-b5237d8 [2022-11-21 16:11:58,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:11:58,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:11:58,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:11:58,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:11:58,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:11:58,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:11:58,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:11:58,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:11:58,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:11:58,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:11:58,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:11:58,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:11:58,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:11:58,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:11:58,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:11:58,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:11:58,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:11:58,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:11:58,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:11:58,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:11:58,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:11:58,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:11:58,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:11:58,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:11:58,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:11:58,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:11:58,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:11:58,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:11:58,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:11:58,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:11:58,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:11:58,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:11:58,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:11:58,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:11:58,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:11:58,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:11:58,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:11:58,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:11:58,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:11:58,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:11:58,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:11:58,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:11:58,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:11:58,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:11:58,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:11:58,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:11:58,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:11:58,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:11:58,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:11:58,265 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:11:58,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:11:58,266 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:11:58,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:11:58,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:11:58,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:11:58,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:11:58,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:11:58,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:11:58,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:11:58,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:11:58,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:11:58,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:11:58,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:11:58,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:11:58,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:11:58,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:11:58,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:11:58,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:11:58,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:11:58,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:11:58,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:11:58,271 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:11:58,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:11:58,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:11:58,272 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_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 [2022-11-21 16:11:58,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:11:58,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:11:58,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:11:58,671 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:11:58,672 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:11:58,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2022-11-21 16:12:01,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:12:02,155 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:12:02,156 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/sv-benchmarks/c/array-fpi/ifeqn1.c [2022-11-21 16:12:02,164 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/data/58843a052/ba1726f81933448d8e8867a832652fdb/FLAGffc03cc2d [2022-11-21 16:12:02,188 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/data/58843a052/ba1726f81933448d8e8867a832652fdb [2022-11-21 16:12:02,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:12:02,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:12:02,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:12:02,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:12:02,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:12:02,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b47778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02, skipping insertion in model container [2022-11-21 16:12:02,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:12:02,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:12:02,464 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_33a3dadf-848d-498c-acce-fdb3efdcc772/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2022-11-21 16:12:02,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:12:02,531 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:12:02,547 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_33a3dadf-848d-498c-acce-fdb3efdcc772/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2022-11-21 16:12:02,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:12:02,595 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:12:02,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02 WrapperNode [2022-11-21 16:12:02,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:12:02,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:12:02,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:12:02,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:12:02,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,670 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-21 16:12:02,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:12:02,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:12:02,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:12:02,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:12:02,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,717 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:12:02,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:12:02,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:12:02,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:12:02,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (1/1) ... [2022-11-21 16:12:02,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:12:02,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:02,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:12:02,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:12:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:12:02,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:12:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:12:02,922 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:12:02,925 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:12:03,169 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:12:03,177 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:12:03,178 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:12:03,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:12:03 BoogieIcfgContainer [2022-11-21 16:12:03,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:12:03,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:12:03,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:12:03,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:12:03,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:12:02" (1/3) ... [2022-11-21 16:12:03,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1701ec14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:12:03, skipping insertion in model container [2022-11-21 16:12:03,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:12:02" (2/3) ... [2022-11-21 16:12:03,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1701ec14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:12:03, skipping insertion in model container [2022-11-21 16:12:03,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:12:03" (3/3) ... [2022-11-21 16:12:03,194 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2022-11-21 16:12:03,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:12:03,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:12:03,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:12:03,297 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;@54cc177a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:12:03,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:12:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2022-11-21 16:12:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:12:03,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:03,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:03,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-11-21 16:12:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:03,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98836312] [2022-11-21 16:12:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:03,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98836312] [2022-11-21 16:12:03,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:12:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684675938] [2022-11-21 16:12:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:03,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:03,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:03,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:03,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:12:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:12:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:03,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:12:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684675938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:12:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131528805] [2022-11-21 16:12:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:03,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:12:03,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:12:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:12:03,918 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-11-21 16:12:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:03,958 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-21 16:12:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:12:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 [2022-11-21 16:12:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:03,972 INFO L225 Difference]: With dead ends: 42 [2022-11-21 16:12:03,972 INFO L226 Difference]: Without dead ends: 19 [2022-11-21 16:12:03,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:12:03,981 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-11-21 16:12:03,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:12:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-21 16:12:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-21 16:12:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-11-21 16:12:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-21 16:12:04,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-11-21 16:12:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:04,020 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-21 16:12:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-21 16:12:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-21 16:12:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:12:04,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:04,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:04,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:12:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:04,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-11-21 16:12:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664080299] [2022-11-21 16:12:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:04,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664080299] [2022-11-21 16:12:04,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:12:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713380138] [2022-11-21 16:12:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:04,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:04,286 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:12:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:04,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:12:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:04,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:12:04,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713380138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:04,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:04,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:12:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243035384] [2022-11-21 16:12:04,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:12:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:12:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:04,537 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-21 16:12:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:04,624 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-21 16:12:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:12:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-21 16:12:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:04,627 INFO L225 Difference]: With dead ends: 42 [2022-11-21 16:12:04,627 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 16:12:04,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:04,629 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:04,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 16:12:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2022-11-21 16:12:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2022-11-21 16:12:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-21 16:12:04,660 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-11-21 16:12:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:04,661 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-21 16:12:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-21 16:12:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-21 16:12:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:12:04,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:04,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:04,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:12:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:04,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-11-21 16:12:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:04,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636655775] [2022-11-21 16:12:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:04,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:04,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758824940] [2022-11-21 16:12:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:04,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:04,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:04,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:12:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:05,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:12:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:05,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:05,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:12:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:05,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636655775] [2022-11-21 16:12:05,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:05,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758824940] [2022-11-21 16:12:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758824940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:05,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:05,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:12:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690544460] [2022-11-21 16:12:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:12:05,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:12:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:12:05,161 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2022-11-21 16:12:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:05,302 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-21 16:12:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:12:05,303 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 18 [2022-11-21 16:12:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:05,304 INFO L225 Difference]: With dead ends: 38 [2022-11-21 16:12:05,304 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 16:12:05,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:12:05,306 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:05,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 16:12:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-21 16:12:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2022-11-21 16:12:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-21 16:12:05,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2022-11-21 16:12:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:05,313 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-21 16:12:05,314 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) [2022-11-21 16:12:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-21 16:12:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:12:05,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:05,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:05,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 16:12:05,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2022-11-21 16:12:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19675080] [2022-11-21 16:12:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:05,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19675080] [2022-11-21 16:12:05,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:12:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190900483] [2022-11-21 16:12:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:05,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:05,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:05,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:12:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:12:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:05,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:12:05,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190900483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:05,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:05,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:12:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315517353] [2022-11-21 16:12:05,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:05,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:12:05,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:12:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:12:05,723 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-21 16:12:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:05,779 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-21 16:12:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:12:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2022-11-21 16:12:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:05,781 INFO L225 Difference]: With dead ends: 55 [2022-11-21 16:12:05,781 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 16:12:05,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:12:05,783 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:05,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:12:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 16:12:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-11-21 16:12:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2022-11-21 16:12:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-21 16:12:05,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-11-21 16:12:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:05,792 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-21 16:12:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-21 16:12:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-21 16:12:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:12:05,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:05,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:06,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-11-21 16:12:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509989733] [2022-11-21 16:12:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:06,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:06,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816645098] [2022-11-21 16:12:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:06,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:06,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:06,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:12:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:12:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:06,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509989733] [2022-11-21 16:12:06,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816645098] [2022-11-21 16:12:06,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816645098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:06,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:06,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-21 16:12:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742961370] [2022-11-21 16:12:06,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:12:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:12:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:12:06,304 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-11-21 16:12:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:06,536 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-21 16:12:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:12:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 21 [2022-11-21 16:12:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:06,540 INFO L225 Difference]: With dead ends: 70 [2022-11-21 16:12:06,540 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 16:12:06,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:12:06,541 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:06,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 43 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:12:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 16:12:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-21 16:12:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2022-11-21 16:12:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-21 16:12:06,548 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-21 16:12:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:06,549 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-21 16:12:06,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-11-21 16:12:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-21 16:12:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:12:06,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:06,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:06,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:06,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-11-21 16:12:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322854398] [2022-11-21 16:12:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:06,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:06,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855304867] [2022-11-21 16:12:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:06,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:06,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:12:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 16:12:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:06,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:12:07,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:07,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 16:12:07,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-21 16:12:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:07,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-21 16:12:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:07,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:12:08,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:08,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322854398] [2022-11-21 16:12:08,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:08,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855304867] [2022-11-21 16:12:08,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855304867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:08,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:08,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2022-11-21 16:12:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687381610] [2022-11-21 16:12:08,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:12:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:12:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:12:08,004 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-11-21 16:12:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:09,673 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2022-11-21 16:12:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:12:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 [2022-11-21 16:12:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:09,675 INFO L225 Difference]: With dead ends: 151 [2022-11-21 16:12:09,675 INFO L226 Difference]: Without dead ends: 131 [2022-11-21 16:12:09,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:12:09,678 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 188 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:09,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 147 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:12:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-21 16:12:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 55. [2022-11-21 16:12:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 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) [2022-11-21 16:12:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-11-21 16:12:09,697 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 24 [2022-11-21 16:12:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:09,697 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-11-21 16:12:09,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2022-11-21 16:12:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-11-21 16:12:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:12:09,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:09,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:09,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:12:09,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-11-21 16:12:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40082146] [2022-11-21 16:12:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:09,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390853411] [2022-11-21 16:12:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:09,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:09,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:09,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:12:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 16:12:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:10,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:12:10,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:10,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-21 16:12:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:10,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-21 16:12:10,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:10,566 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-21 16:12:10,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2022-11-21 16:12:10,854 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-21 16:12:10,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 35 [2022-11-21 16:12:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:10,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:12,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-11-21 16:12:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40082146] [2022-11-21 16:12:13,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:13,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390853411] [2022-11-21 16:12:13,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390853411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:13,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-21 16:12:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845987921] [2022-11-21 16:12:13,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:13,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:12:13,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:12:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:12:13,020 INFO L87 Difference]: Start difference. First operand 55 states and 66 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) [2022-11-21 16:12:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:26,697 INFO L93 Difference]: Finished difference Result 225 states and 264 transitions. [2022-11-21 16:12:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:12:26,697 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 28 [2022-11-21 16:12:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:26,700 INFO L225 Difference]: With dead ends: 225 [2022-11-21 16:12:26,700 INFO L226 Difference]: Without dead ends: 199 [2022-11-21 16:12:26,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=711, Invalid=2481, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 16:12:26,703 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 490 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:26,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 205 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-21 16:12:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-21 16:12:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2022-11-21 16:12:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.309278350515464) internal successors, (127), 97 states have internal predecessors, (127), 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) [2022-11-21 16:12:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2022-11-21 16:12:26,735 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 28 [2022-11-21 16:12:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:26,736 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2022-11-21 16:12:26,736 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) [2022-11-21 16:12:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2022-11-21 16:12:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:12:26,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:26,738 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:26,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:26,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:26,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-11-21 16:12:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:26,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994948664] [2022-11-21 16:12:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:26,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:26,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575950056] [2022-11-21 16:12:26,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:27,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:12:27,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:12:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:12:27,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:12:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994948664] [2022-11-21 16:12:27,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575950056] [2022-11-21 16:12:27,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575950056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:27,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:27,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-21 16:12:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207507655] [2022-11-21 16:12:27,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:12:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:12:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:12:27,279 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-11-21 16:12:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:27,507 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2022-11-21 16:12:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:12:27,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 [2022-11-21 16:12:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:27,509 INFO L225 Difference]: With dead ends: 207 [2022-11-21 16:12:27,509 INFO L226 Difference]: Without dead ends: 120 [2022-11-21 16:12:27,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:12:27,511 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:27,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 67 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:12:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-21 16:12:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2022-11-21 16:12:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 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) [2022-11-21 16:12:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2022-11-21 16:12:27,534 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 32 [2022-11-21 16:12:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:27,535 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2022-11-21 16:12:27,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-11-21 16:12:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2022-11-21 16:12:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 16:12:27,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:27,537 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:27,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:27,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:27,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2022-11-21 16:12:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106081000] [2022-11-21 16:12:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:27,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:27,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915918817] [2022-11-21 16:12:27,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:27,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:27,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:27,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:27,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:12:27,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:12:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:28,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:28,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:28,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106081000] [2022-11-21 16:12:28,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:28,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915918817] [2022-11-21 16:12:28,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915918817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:28,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:28,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-21 16:12:28,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288349004] [2022-11-21 16:12:28,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:28,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:12:28,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:28,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:12:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:12:28,239 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2022-11-21 16:12:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:28,732 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2022-11-21 16:12:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:12:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 36 [2022-11-21 16:12:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:28,734 INFO L225 Difference]: With dead ends: 227 [2022-11-21 16:12:28,734 INFO L226 Difference]: Without dead ends: 175 [2022-11-21 16:12:28,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:12:28,736 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 178 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:28,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 101 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:12:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-21 16:12:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 130. [2022-11-21 16:12:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 129 states have internal predecessors, (158), 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) [2022-11-21 16:12:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-11-21 16:12:28,772 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 36 [2022-11-21 16:12:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:28,773 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-11-21 16:12:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2022-11-21 16:12:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-11-21 16:12:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 16:12:28,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:28,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:28,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:28,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1014177285, now seen corresponding path program 3 times [2022-11-21 16:12:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:28,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366037717] [2022-11-21 16:12:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:28,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:29,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:29,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072177625] [2022-11-21 16:12:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:29,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:29,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:12:29,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:12:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:12:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:29,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:29,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-11-21 16:12:29,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:29,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2022-11-21 16:12:30,000 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-21 16:12:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:30,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 16:12:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 16:12:30,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:30,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-21 16:12:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-21 16:12:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366037717] [2022-11-21 16:12:31,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072177625] [2022-11-21 16:12:31,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072177625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:31,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:31,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2022-11-21 16:12:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180237166] [2022-11-21 16:12:31,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 16:12:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 16:12:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:12:31,051 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:36,517 INFO L93 Difference]: Finished difference Result 267 states and 322 transitions. [2022-11-21 16:12:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-21 16:12:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-21 16:12:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:36,519 INFO L225 Difference]: With dead ends: 267 [2022-11-21 16:12:36,519 INFO L226 Difference]: Without dead ends: 203 [2022-11-21 16:12:36,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1009, Invalid=3281, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 16:12:36,522 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 429 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:36,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 89 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:12:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-21 16:12:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 140. [2022-11-21 16:12:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 139 states have internal predecessors, (166), 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) [2022-11-21 16:12:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2022-11-21 16:12:36,563 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 36 [2022-11-21 16:12:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:36,563 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2022-11-21 16:12:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2022-11-21 16:12:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:12:36,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:36,565 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:36,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:36,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:12:36,773 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2022-11-21 16:12:36,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:36,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544617748] [2022-11-21 16:12:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:36,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:36,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920854740] [2022-11-21 16:12:36,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:12:36,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:36,798 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:36,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:12:36,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:12:36,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:12:36,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:12:37,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:12:37,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:37,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544617748] [2022-11-21 16:12:37,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:37,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920854740] [2022-11-21 16:12:37,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920854740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:37,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:37,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-21 16:12:37,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660885398] [2022-11-21 16:12:37,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:37,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:12:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:12:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:12:37,415 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2022-11-21 16:12:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:38,502 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2022-11-21 16:12:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:12:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 [2022-11-21 16:12:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:38,505 INFO L225 Difference]: With dead ends: 179 [2022-11-21 16:12:38,505 INFO L226 Difference]: Without dead ends: 170 [2022-11-21 16:12:38,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=1466, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 16:12:38,507 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 183 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:38,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 93 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:12:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-21 16:12:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2022-11-21 16:12:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 139 states have internal predecessors, (164), 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) [2022-11-21 16:12:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2022-11-21 16:12:38,557 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 37 [2022-11-21 16:12:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:38,557 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2022-11-21 16:12:38,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2022-11-21 16:12:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2022-11-21 16:12:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:12:38,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:38,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:38,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:12:38,768 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:12:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2022-11-21 16:12:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778702753] [2022-11-21 16:12:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:38,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:12:38,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732743345] [2022-11-21 16:12:38,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:38,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:38,822 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:38,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:12:39,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 16:12:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:39,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:12:39,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:39,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-11-21 16:12:39,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-21 16:12:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-21 16:12:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-21 16:12:39,660 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-21 16:12:39,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2022-11-21 16:12:39,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-11-21 16:12:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 59 [2022-11-21 16:12:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:39,981 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-21 16:12:39,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2022-11-21 16:12:40,489 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-21 16:12:40,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2022-11-21 16:12:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:54,117 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 115 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:12:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778702753] [2022-11-21 16:12:56,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:12:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732743345] [2022-11-21 16:12:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732743345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:56,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:12:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-21 16:12:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774098068] [2022-11-21 16:12:56,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:56,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:12:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:12:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:12:56,832 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2022-11-21 16:13:22,765 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 224 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:13:40,633 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 180 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:13:57,484 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse33 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse44 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse34 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse31 (* .cse33 8))) (let ((.cse14 (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse49 (+ .cse31 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse50 (* (mod .cse34 4294967296) 8)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse35 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse40 (* 8 .cse44))) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse32 (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (.cse15 (select .cse35 (+ .cse40 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse16 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse40))) (.cse11 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse13 (+ .cse50 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse9 (select .cse35 .cse49)) (.cse10 (select .cse5 .cse14))) (let ((.cse7 (store .cse35 .cse13 (+ .cse9 .cse10))) (.cse18 (select .cse35 .cse11)) (.cse12 (store .cse35 .cse49 (+ .cse15 .cse16))) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ .cse32 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (+ .cse50 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse17 (select .cse35 .cse3))) (and (forall ((v_ArrVal_346 Int)) (= 6 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse6 v_ArrVal_346)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 .cse3 (+ .cse0 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))))) (= 7 (select (store .cse7 .cse8 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse9 .cse10)) .cse11)) (= 7 (select (store .cse12 .cse13 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse12) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14) .cse15 .cse16)) .cse11)) (= (+ .cse17 4) .cse18) (= 7 (select .cse7 .cse11)) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse19 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse18 (+ .cse17 (select .cse19 8))) (= (+ (select .cse19 0) 1) .cse17)))) (forall ((v_ArrVal_346 Int)) (= 6 (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse14 v_ArrVal_346)))) (let ((.cse21 (store (select .cse20 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse22 (select (select (store .cse20 |c_ULTIMATE.start_main_~b~0#1.base| .cse21) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse20 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse21 .cse3 (+ .cse22 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse22)))))) (= (select .cse5 .cse4) 4) (or (let ((.cse23 (<= .cse33 2147483647)) (.cse27 (+ .cse32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (not .cse23) (forall ((v_ArrVal_346 Int)) (= (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse6 (+ 2 .cse10)) .cse27 v_ArrVal_346)))) (let ((.cse26 (store (select .cse25 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse24 (select (select (store .cse25 |c_ULTIMATE.start_main_~b~0#1.base| .cse26) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse24 (select (select (store .cse25 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse26 .cse3 (+ .cse24 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 6))) (or .cse23 (forall ((v_ArrVal_346 Int)) (= 6 (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse6 (+ 2 (select .cse5 (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))))) .cse27 v_ArrVal_346)))) (let ((.cse29 (store (select .cse28 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse30 (select (select (store .cse28 |c_ULTIMATE.start_main_~b~0#1.base| .cse29) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse29 .cse3 (+ .cse30 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse30))))))))) (= .cse34 0)) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse35 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select .cse12 .cse11) 7) (or (let ((.cse36 (<= .cse44 2147483647))) (and (or .cse36 (forall ((v_ArrVal_346 Int)) (= (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse14 (+ (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse40)) 2)) .cse6 v_ArrVal_346)))) (let ((.cse38 (store (select .cse37 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse39 (select (select (store .cse37 |c_ULTIMATE.start_main_~b~0#1.base| .cse38) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse37 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse38 .cse3 (+ .cse39 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse39)))) 6))) (or (forall ((v_ArrVal_346 Int)) (= 6 (let ((.cse41 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse14 (+ 2 .cse16)) .cse6 v_ArrVal_346)))) (let ((.cse42 (store (select .cse41 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse43 (select (select (store .cse41 |c_ULTIMATE.start_main_~b~0#1.base| .cse42) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse41 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse42 .cse3 (+ .cse43 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse43)))))) (not .cse36)))) (= |c_ULTIMATE.start_main_~i~0#1| 0)) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 7 (select (let ((.cse48 (store .cse35 |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse46 (select .cse48 .cse49)) (.cse47 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse48) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse45 (store .cse48 .cse13 (+ .cse46 .cse47)))) (store .cse45 .cse8 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse45) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse46 .cse47))))) .cse11)) (= 3 .cse17) (= 2 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) is different from true [2022-11-21 16:14:16,719 WARN L233 SmtUtils]: Spent 13.52s on a formula simplification. DAG size of input: 212 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:14:36,455 WARN L233 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 210 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:14:53,086 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 213 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:03,317 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 169 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:14,528 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 166 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:37,404 INFO L93 Difference]: Finished difference Result 488 states and 564 transitions. [2022-11-21 16:15:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-21 16:15:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 [2022-11-21 16:15:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:37,406 INFO L225 Difference]: With dead ends: 488 [2022-11-21 16:15:37,406 INFO L226 Difference]: Without dead ends: 300 [2022-11-21 16:15:37,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 153.5s TimeCoverageRelationStatistics Valid=1227, Invalid=5418, Unknown=1, NotChecked=160, Total=6806 [2022-11-21 16:15:37,409 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 830 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:37,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 315 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 811 Invalid, 0 Unknown, 1 Unchecked, 22.3s Time] [2022-11-21 16:15:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-21 16:15:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 116. [2022-11-21 16:15:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.208695652173913) internal successors, (139), 115 states have internal predecessors, (139), 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) [2022-11-21 16:15:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2022-11-21 16:15:37,457 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 38 [2022-11-21 16:15:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:37,457 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2022-11-21 16:15:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2022-11-21 16:15:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2022-11-21 16:15:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:15:37,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:37,459 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:37,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-21 16:15:37,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:15:37,666 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1616997781, now seen corresponding path program 4 times [2022-11-21 16:15:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511832152] [2022-11-21 16:15:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:37,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:15:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10357773] [2022-11-21 16:15:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:15:37,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:37,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:15:37,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:15:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:15:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:15:38,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:15:38,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511832152] [2022-11-21 16:15:38,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:15:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10357773] [2022-11-21 16:15:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10357773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:38,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:15:38,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-21 16:15:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755309689] [2022-11-21 16:15:38,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:15:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:15:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:15:38,148 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2022-11-21 16:15:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:38,774 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2022-11-21 16:15:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:15:38,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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 [2022-11-21 16:15:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:38,776 INFO L225 Difference]: With dead ends: 253 [2022-11-21 16:15:38,777 INFO L226 Difference]: Without dead ends: 199 [2022-11-21 16:15:38,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:15:38,781 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 229 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:38,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 130 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:15:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-21 16:15:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2022-11-21 16:15:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1700680272108843) internal successors, (172), 147 states have internal predecessors, (172), 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) [2022-11-21 16:15:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2022-11-21 16:15:38,859 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 45 [2022-11-21 16:15:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:38,859 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2022-11-21 16:15:38,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2022-11-21 16:15:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2022-11-21 16:15:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:15:38,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:38,862 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:38,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-21 16:15:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:39,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash 58856955, now seen corresponding path program 5 times [2022-11-21 16:15:39,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:39,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100066180] [2022-11-21 16:15:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:39,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:15:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992147946] [2022-11-21 16:15:39,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:15:39,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:39,100 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:39,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:15:47,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 16:15:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:15:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:15:47,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:15:47,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100066180] [2022-11-21 16:15:47,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:15:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992147946] [2022-11-21 16:15:47,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992147946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:47,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:15:47,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-11-21 16:15:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353213471] [2022-11-21 16:15:47,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:47,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:15:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:15:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:15:47,900 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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) [2022-11-21 16:15:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:15:49,053 INFO L93 Difference]: Finished difference Result 338 states and 384 transitions. [2022-11-21 16:15:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:15:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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 46 [2022-11-21 16:15:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:15:49,059 INFO L225 Difference]: With dead ends: 338 [2022-11-21 16:15:49,059 INFO L226 Difference]: Without dead ends: 197 [2022-11-21 16:15:49,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=1271, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:15:49,061 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 265 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:15:49,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 266 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:15:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-21 16:15:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 130. [2022-11-21 16:15:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 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) [2022-11-21 16:15:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-11-21 16:15:49,126 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 46 [2022-11-21 16:15:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:15:49,126 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-11-21 16:15:49,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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) [2022-11-21 16:15:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-11-21 16:15:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:15:49,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:15:49,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:49,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:49,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:49,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:15:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1846236060, now seen corresponding path program 6 times [2022-11-21 16:15:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:49,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359201083] [2022-11-21 16:15:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:49,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:15:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768878057] [2022-11-21 16:15:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:15:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:49,377 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:49,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a3dadf-848d-498c-acce-fdb3efdcc772/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:15:50,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-21 16:15:50,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:15:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-21 16:15:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:50,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:15:50,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:15:50,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-11-21 16:15:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:15:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-21 16:15:50,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 132 [2022-11-21 16:15:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:50,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 203 [2022-11-21 16:15:50,811 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-21 16:15:51,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 74 [2022-11-21 16:15:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 138 [2022-11-21 16:15:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 47 [2022-11-21 16:15:51,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-11-21 16:15:51,620 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-21 16:15:51,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 150 [2022-11-21 16:15:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:15:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-11-21 16:15:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:51,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2022-11-21 16:15:52,187 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-21 16:15:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 193 [2022-11-21 16:15:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 240 [2022-11-21 16:15:52,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 90 [2022-11-21 16:15:52,675 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-21 16:15:52,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 195 treesize of output 167 [2022-11-21 16:15:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:15:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 236 [2022-11-21 16:15:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:52,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 132 [2022-11-21 16:15:54,136 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-21 16:15:54,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 50 [2022-11-21 16:15:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:54,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:35,095 WARN L233 SmtUtils]: Spent 15.87s on a formula simplification. DAG size of input: 144 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:17:15,119 WARN L233 SmtUtils]: Spent 23.38s on a formula simplification. DAG size of input: 154 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:17:26,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291376055442 treesize of output 282224346258