./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ss2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:30:37,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:37,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:37,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:37,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:37,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:37,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:37,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:37,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:38,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:38,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:38,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:38,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:38,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:38,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:38,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:38,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:38,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:38,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:38,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:38,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:38,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:38,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:38,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:38,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:38,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:38,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:38,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:38,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:38,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:38,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:38,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:38,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:38,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:38,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:38,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:38,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:38,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:38,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:38,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:38,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:30:38,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:38,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:38,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:38,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:38,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:38,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:38,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:38,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:38,102 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:38,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:38,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:38,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:38,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:38,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:38,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:38,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:38,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:38,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:38,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:38,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:38,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:38,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:38,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:38,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:38,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:38,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:38,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:38,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:38,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:38,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:38,108 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:38,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:38,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:38,109 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_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 [2022-11-20 10:30:38,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:38,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:38,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:38,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:38,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:38,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-fpi/ss2.c [2022-11-20 10:30:41,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:41,934 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:41,935 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/sv-benchmarks/c/array-fpi/ss2.c [2022-11-20 10:30:41,943 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/data/67ba8b707/246b3924dbfe4de5a17a75b1139c2bcc/FLAG0689952d9 [2022-11-20 10:30:41,963 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/data/67ba8b707/246b3924dbfe4de5a17a75b1139c2bcc [2022-11-20 10:30:41,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:41,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:41,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:41,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:41,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:41,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:41" (1/1) ... [2022-11-20 10:30:41,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190ed949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:41, skipping insertion in model container [2022-11-20 10:30:41,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:41" (1/1) ... [2022-11-20 10:30:41,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:42,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:42,194 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_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2022-11-20 10:30:42,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:42,228 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:42,241 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_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2022-11-20 10:30:42,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:42,267 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:42,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42 WrapperNode [2022-11-20 10:30:42,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:42,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:42,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:42,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:42,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,307 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-11-20 10:30:42,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:42,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:42,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:42,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:42,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:42,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:42,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:42,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:42,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (1/1) ... [2022-11-20 10:30:42,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:42,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:30:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:30:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:42,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:30:42,509 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:42,512 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:42,741 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:42,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:42,747 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 10:30:42,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:42 BoogieIcfgContainer [2022-11-20 10:30:42,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:42,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:42,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:42,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:42,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:41" (1/3) ... [2022-11-20 10:30:42,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e4af0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:42, skipping insertion in model container [2022-11-20 10:30:42,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:42" (2/3) ... [2022-11-20 10:30:42,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e4af0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:42, skipping insertion in model container [2022-11-20 10:30:42,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:42" (3/3) ... [2022-11-20 10:30:42,771 INFO L112 eAbstractionObserver]: Analyzing ICFG ss2.c [2022-11-20 10:30:42,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:42,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:30:42,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:42,898 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;@5678fbba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:42,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:30:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 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) [2022-11-20 10:30:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:30:42,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:42,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:42,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -642180410, now seen corresponding path program 1 times [2022-11-20 10:30:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422781893] [2022-11-20 10:30:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:43,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422781893] [2022-11-20 10:30:43,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:30:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213647948] [2022-11-20 10:30:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:43,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:43,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:43,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 10:30:43,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:43,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:43,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213647948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:43,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:43,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314734651] [2022-11-20 10:30:43,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:43,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:30:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:30:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:30:43,330 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 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) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:43,347 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2022-11-20 10:30:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:30:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:30:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:43,357 INFO L225 Difference]: With dead ends: 62 [2022-11-20 10:30:43,358 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 10:30:43,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:30:43,364 INFO L413 NwaCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:43,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 10:30:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 10:30:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-20 10:30:43,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2022-11-20 10:30:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:43,397 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-20 10:30:43,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-20 10:30:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:30:43,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:43,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:43,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:30:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 10:30:43,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1011332042, now seen corresponding path program 1 times [2022-11-20 10:30:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:43,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491460769] [2022-11-20 10:30:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491460769] [2022-11-20 10:30:43,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:30:43,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273731509] [2022-11-20 10:30:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:43,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:43,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:30:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:43,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:43,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273731509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:43,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:43,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:30:43,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509265761] [2022-11-20 10:30:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:43,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:43,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:43,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:43,882 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:43,984 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-20 10:30:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:30:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:30:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:43,986 INFO L225 Difference]: With dead ends: 69 [2022-11-20 10:30:43,986 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:30:43,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:43,988 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:43,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:30:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-20 10:30:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-20 10:30:44,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2022-11-20 10:30:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:44,013 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-20 10:30:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-20 10:30:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:30:44,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:44,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:44,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 10:30:44,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1890076394, now seen corresponding path program 1 times [2022-11-20 10:30:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:44,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215652483] [2022-11-20 10:30:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:44,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:30:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689916408] [2022-11-20 10:30:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:44,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:44,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:44,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:44,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:44,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 10:30:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:44,480 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 [2022-11-20 10:30:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:44,526 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 [2022-11-20 10:30:44,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:44,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-20 10:30:44,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:44,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-20 10:30:44,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:44,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-20 10:30:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:45,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2022-11-20 10:30:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:45,224 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2022-11-20 10:30:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:45,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-11-20 10:30:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:45,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215652483] [2022-11-20 10:30:48,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:30:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689916408] [2022-11-20 10:30:48,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689916408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:48,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:30:48,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2022-11-20 10:30:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927477687] [2022-11-20 10:30:48,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:30:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:30:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:30:48,519 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:54,437 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-20 10:30:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:30:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:30:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:54,440 INFO L225 Difference]: With dead ends: 81 [2022-11-20 10:30:54,440 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 10:30:54,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:30:54,443 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:54,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 148 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 556 Invalid, 0 Unknown, 88 Unchecked, 2.0s Time] [2022-11-20 10:30:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 10:30:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-11-20 10:30:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 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) [2022-11-20 10:30:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-20 10:30:54,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 32 [2022-11-20 10:30:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:54,461 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-20 10:30:54,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-20 10:30:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:30:54,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:54,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:54,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:54,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1237633832, now seen corresponding path program 2 times [2022-11-20 10:30:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:54,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746330922] [2022-11-20 10:30:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:54,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:54,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:30:54,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769218433] [2022-11-20 10:30:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:54,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:54,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:54,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:30:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:30:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:30:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746330922] [2022-11-20 10:30:55,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:30:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769218433] [2022-11-20 10:30:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769218433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:55,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:30:55,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 10:30:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207058306] [2022-11-20 10:30:55,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:30:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:30:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:30:55,029 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:55,294 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2022-11-20 10:30:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 10:30:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:55,295 INFO L225 Difference]: With dead ends: 156 [2022-11-20 10:30:55,295 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 10:30:55,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:55,297 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:55,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 50 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 10:30:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-11-20 10:30:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-20 10:30:55,311 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 34 [2022-11-20 10:30:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:55,311 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-20 10:30:55,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-20 10:30:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:30:55,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:55,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:55,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:55,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash 999316006, now seen corresponding path program 3 times [2022-11-20 10:30:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:55,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659067096] [2022-11-20 10:30:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:55,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:30:55,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690855367] [2022-11-20 10:30:55,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:30:55,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:55,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:55,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:55,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:55,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:30:55,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:55,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:30:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:30:55,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:30:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659067096] [2022-11-20 10:30:55,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:30:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690855367] [2022-11-20 10:30:55,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690855367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:55,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:30:55,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 10:30:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328518646] [2022-11-20 10:30:55,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:55,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:30:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:30:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:30:55,820 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:56,050 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-11-20 10:30:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 10:30:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:56,052 INFO L225 Difference]: With dead ends: 81 [2022-11-20 10:30:56,052 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 10:30:56,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:30:56,053 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:56,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 37 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 10:30:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2022-11-20 10:30:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-20 10:30:56,063 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2022-11-20 10:30:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:56,063 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-20 10:30:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-20 10:30:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 10:30:56,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:56,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:56,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:56,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:56,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash 772187038, now seen corresponding path program 4 times [2022-11-20 10:30:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239399618] [2022-11-20 10:30:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:56,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:30:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502958663] [2022-11-20 10:30:56,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:30:56,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:56,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:56,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:30:56,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:30:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:56,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 10:30:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:56,541 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 [2022-11-20 10:30:56,551 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 [2022-11-20 10:30:56,578 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 23 treesize of output 22 [2022-11-20 10:30:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:56,649 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:30:56,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-20 10:30:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:56,843 INFO L321 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2022-11-20 10:30:56,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 49 treesize of output 50 [2022-11-20 10:30:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:56,967 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-20 10:30:56,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 58 [2022-11-20 10:30:57,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:57,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:57,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:57,415 INFO L321 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2022-11-20 10:30:57,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 72 [2022-11-20 10:30:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:57,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:57,625 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:30:57,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2022-11-20 10:30:57,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:57,847 INFO L321 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2022-11-20 10:30:57,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 55 [2022-11-20 10:30:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:58,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-20 10:30:58,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:58,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:58,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2022-11-20 10:30:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:58,402 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-20 10:30:58,403 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 53 treesize of output 37 [2022-11-20 10:30:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:30:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:58,672 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2022-11-20 10:30:58,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 53 [2022-11-20 10:30:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:30:58,865 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:30:58,865 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 3 case distinctions, treesize of input 37 treesize of output 33 [2022-11-20 10:30:59,071 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:30:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 39 [2022-11-20 10:30:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:59,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:37,943 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_110| Int) (~N~0 Int)) (or (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (= (let ((.cse6 (let ((.cse14 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse13 (* 8 |v_ULTIMATE.start_main_~i~0#1_110|))) (let ((.cse11 (select .cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13))) (.cse12 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse11 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse13)) .cse12))))))))) (.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (store (store (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| 0) .cse5 0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse4))) (store .cse7 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse3 .cse4)))))))) (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (not (< (+ |v_ULTIMATE.start_main_~i~0#1_110| 1) ~N~0)) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_110|) ~N~0))) is different from false [2022-11-20 10:33:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 10:33:31,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239399618] [2022-11-20 10:33:31,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:33:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502958663] [2022-11-20 10:33:31,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502958663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:31,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:31,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-11-20 10:33:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875605515] [2022-11-20 10:33:31,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:31,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 10:33:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 10:33:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3090, Unknown=55, NotChecked=114, Total=3540 [2022-11-20 10:33:31,769 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:06,856 WARN L233 SmtUtils]: Spent 17.08s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:36:09,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:36:13,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:37:14,214 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:38:24,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:39:00,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:39:25,472 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:39:31,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:04,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:19,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:25,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:27,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:29,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 10:40:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:51,015 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-11-20 10:40:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 10:40:51,016 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 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 44 [2022-11-20 10:40:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:51,018 INFO L225 Difference]: With dead ends: 128 [2022-11-20 10:40:51,018 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 10:40:51,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 533.1s TimeCoverageRelationStatistics Valid=586, Invalid=7689, Unknown=101, NotChecked=180, Total=8556 [2022-11-20 10:40:51,023 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 103 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 57.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:51,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 229 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1008 Invalid, 5 Unknown, 601 Unchecked, 57.8s Time] [2022-11-20 10:40:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 10:40:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2022-11-20 10:40:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.180952380952381) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-11-20 10:40:51,059 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 44 [2022-11-20 10:40:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-11-20 10:40:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-11-20 10:40:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 10:40:51,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:51,062 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:51,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 10:40:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:40:51,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 236235548, now seen corresponding path program 5 times [2022-11-20 10:40:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503882611] [2022-11-20 10:40:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:51,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:40:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451320090] [2022-11-20 10:40:51,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:40:51,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:51,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:40:51,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:40:51,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:40:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:40:52,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:40:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:52,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503882611] [2022-11-20 10:40:52,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:40:52,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451320090] [2022-11-20 10:40:52,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451320090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:52,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:52,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 10:40:52,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069048141] [2022-11-20 10:40:52,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:52,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:40:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:40:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:52,736 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:54,082 INFO L93 Difference]: Finished difference Result 230 states and 264 transitions. [2022-11-20 10:40:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:40:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 10:40:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:54,085 INFO L225 Difference]: With dead ends: 230 [2022-11-20 10:40:54,085 INFO L226 Difference]: Without dead ends: 155 [2022-11-20 10:40:54,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:40:54,087 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:54,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 74 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:40:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-20 10:40:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2022-11-20 10:40:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-11-20 10:40:54,128 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 46 [2022-11-20 10:40:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:54,128 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-11-20 10:40:54,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-11-20 10:40:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 10:40:54,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:54,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:54,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 10:40:54,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:54,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1604826084, now seen corresponding path program 6 times [2022-11-20 10:40:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033344777] [2022-11-20 10:40:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:54,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:40:54,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828286264] [2022-11-20 10:40:54,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:40:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:54,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:54,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:40:54,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:40:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:40:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:40:55,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:40:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:40:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033344777] [2022-11-20 10:40:55,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:40:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828286264] [2022-11-20 10:40:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828286264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:55,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:55,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 10:40:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342851321] [2022-11-20 10:40:55,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:40:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:40:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:40:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:55,702 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:57,924 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2022-11-20 10:40:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:40:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 10:40:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:57,926 INFO L225 Difference]: With dead ends: 154 [2022-11-20 10:40:57,927 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 10:40:57,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:40:57,928 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 134 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:57,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 91 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 10:40:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 10:40:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2022-11-20 10:40:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-11-20 10:40:57,958 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 46 [2022-11-20 10:40:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:57,959 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-11-20 10:40:57,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-11-20 10:40:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 10:40:57,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:57,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:57,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 10:40:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:58,169 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:40:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash -977955692, now seen corresponding path program 1 times [2022-11-20 10:40:58,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:40:58,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717710145] [2022-11-20 10:40:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:40:58,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:40:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973917407] [2022-11-20 10:40:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:40:58,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:40:58,210 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:40:58,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2db4493-6b2e-4d3c-b7f5-5efd0e671a8e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:40:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 10:40:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:58,369 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 [2022-11-20 10:40:58,739 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 15 treesize of output 11 [2022-11-20 10:40:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:59,012 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 21 treesize of output 20 [2022-11-20 10:40:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:40:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:59,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-20 10:40:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:59,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 32 [2022-11-20 10:40:59,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 10:40:59,929 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 21 treesize of output 17 [2022-11-20 10:41:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:00,084 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 25 treesize of output 27 [2022-11-20 10:41:00,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:41:00,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:00,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-11-20 10:41:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:00,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2022-11-20 10:41:01,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:01,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 41 [2022-11-20 10:41:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:41:01,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:24,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:24,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-11-20 10:41:24,180 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (= .cse0 (+ (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse0 .cse3))))))) is different from false [2022-11-20 10:41:24,352 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse4 .cse5 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse4 .cse5))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse1 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= .cse0 .cse1)) (= .cse0 (+ (select .cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))) is different from false [2022-11-20 10:41:24,563 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse4 .cse5 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse4 .cse5))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse3 (+ (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or (= .cse0 (+ (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse0 .cse3))))))) is different from false [2022-11-20 10:41:24,643 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse5 (+ .cse8 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (let ((.cse7 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse6 .cse7 (+ (select .cse6 .cse7) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse4 .cse5 (+ (select .cse6 .cse5) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse2 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))) (.cse3 (+ (* 2 ~N~0) (* ~N~0 ~N~0)))) (or (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) .cse3) (not (= .cse2 .cse3))))))) is different from false [2022-11-20 10:41:26,723 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse5 .cse4 (+ (select .cse6 .cse4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))) (.cse1 (+ (* 2 ~N~0) (* ~N~0 ~N~0)))) (or (not (= .cse0 .cse1)) (= (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse3 .cse4)) .cse1))))))) is different from false [2022-11-20 10:41:28,912 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse5 .cse3 (+ (select .cse6 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse2 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse3)) .cse4) (not (= .cse4 .cse2)))))))) is different from false [2022-11-20 10:41:30,997 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse5 .cse3 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 .cse3)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse1 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= .cse0 .cse1)) (= .cse0 (+ (select .cse2 .cse3) (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))))))) is different from false [2022-11-20 10:41:38,621 WARN L233 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 102 DAG size of output: 64 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-20 10:41:38,622 INFO L321 Elim1Store]: treesize reduction 530, result has 47.1 percent of original size [2022-11-20 10:41:38,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 16880 treesize of output 4465 [2022-11-20 10:41:39,234 INFO L217 Elim1Store]: Index analysis took 104 ms [2022-11-20 10:41:42,196 INFO L321 Elim1Store]: treesize reduction 274, result has 6.8 percent of original size [2022-11-20 10:41:42,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 7167 treesize of output 7142 [2022-11-20 10:41:42,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 11316 treesize of output 10973 [2022-11-20 10:41:42,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:42,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7066 treesize of output 7060 [2022-11-20 10:41:43,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:43,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12192 treesize of output 11250