./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7db00fa220927f51e1e342e06102a5d28a1c61268049ef86f9068e213c9adb5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 21:11:42,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:11:42,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:11:42,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:11:42,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:11:42,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:11:42,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:11:42,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:11:42,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:11:42,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:11:42,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:11:42,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:11:42,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:11:42,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:11:42,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:11:42,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:11:42,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:11:42,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:11:42,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:11:42,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:11:42,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:11:42,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:11:42,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:11:42,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:11:42,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:11:42,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:11:42,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:11:42,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:11:42,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:11:42,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:11:42,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:11:42,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:11:42,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:11:42,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:11:42,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:11:42,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:11:42,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:11:42,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:11:42,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:11:42,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:11:42,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:11:42,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:11:42,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:11:42,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:11:42,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:11:42,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:11:42,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:11:42,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:11:42,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:11:42,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:11:42,348 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:11:42,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:11:42,348 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:11:42,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:11:42,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:11:42,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:11:42,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:11:42,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:11:42,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:11:42,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:11:42,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:11:42,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:11:42,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:11:42,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:11:42,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:11:42,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:11:42,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:42,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:11:42,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:11:42,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:11:42,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:11:42,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:11:42,358 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:11:42,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:11:42,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:11:42,359 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_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7db00fa220927f51e1e342e06102a5d28a1c61268049ef86f9068e213c9adb5 [2022-11-18 21:11:42,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:11:42,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:11:42,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:11:42,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:11:42,651 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:11:42,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2022-11-18 21:11:42,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/data/a533f115a/ea51a831ecc64713a1558ebbbfbe70bb/FLAG49ff94058 [2022-11-18 21:11:43,234 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:11:43,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2022-11-18 21:11:43,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/data/a533f115a/ea51a831ecc64713a1558ebbbfbe70bb/FLAG49ff94058 [2022-11-18 21:11:43,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/data/a533f115a/ea51a831ecc64713a1558ebbbfbe70bb [2022-11-18 21:11:43,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:11:43,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:11:43,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:43,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:11:43,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:11:43,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:43,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b454c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43, skipping insertion in model container [2022-11-18 21:11:43,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:43,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:11:43,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:11:43,836 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2022-11-18 21:11:43,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:43,895 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:11:43,913 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2022-11-18 21:11:43,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:43,951 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:11:43,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43 WrapperNode [2022-11-18 21:11:43,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:43,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:43,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:11:43,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:11:43,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:43,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:43,991 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-11-18 21:11:43,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:43,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:11:43,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:11:43,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:11:44,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,020 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:11:44,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:11:44,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:11:44,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:11:44,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (1/1) ... [2022-11-18 21:11:44,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:44,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:11:44,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:11:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:11:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 21:11:44,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 21:11:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:11:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:11:44,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:11:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 21:11:44,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 21:11:44,168 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:11:44,176 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:11:44,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:11:44,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:11:44,303 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 21:11:44,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:44 BoogieIcfgContainer [2022-11-18 21:11:44,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:11:44,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:11:44,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:11:44,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:11:44,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:11:43" (1/3) ... [2022-11-18 21:11:44,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3278bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:44, skipping insertion in model container [2022-11-18 21:11:44,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:43" (2/3) ... [2022-11-18 21:11:44,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3278bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:44, skipping insertion in model container [2022-11-18 21:11:44,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:44" (3/3) ... [2022-11-18 21:11:44,321 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.c [2022-11-18 21:11:44,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:11:44,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:11:44,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:11:44,428 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;@674b4fa5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:11:44,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:11:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:11:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:11:44,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:44,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:44,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2022-11-18 21:11:44,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:44,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552281856] [2022-11-18 21:11:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552281856] [2022-11-18 21:11:44,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 21:11:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606190002] [2022-11-18 21:11:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:44,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:44,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:11:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 21:11:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:11:44,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606190002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:44,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:44,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805577383] [2022-11-18 21:11:44,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 21:11:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 21:11:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:11:44,806 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:11:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:44,839 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2022-11-18 21:11:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 21:11:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-18 21:11:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:44,864 INFO L225 Difference]: With dead ends: 45 [2022-11-18 21:11:44,865 INFO L226 Difference]: Without dead ends: 20 [2022-11-18 21:11:44,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:11:44,887 INFO L413 NwaCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:44,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-18 21:11:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-18 21:11:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 21:11:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-18 21:11:44,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2022-11-18 21:11:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:44,934 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-18 21:11:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:11:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-18 21:11:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:11:44,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:44,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:44,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:45,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2022-11-18 21:11:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121434346] [2022-11-18 21:11:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:45,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:45,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802547170] [2022-11-18 21:11:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:45,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:45,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:45,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:11:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 21:11:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:11:45,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:45,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121434346] [2022-11-18 21:11:45,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:45,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802547170] [2022-11-18 21:11:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802547170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:45,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:45,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:11:45,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081524030] [2022-11-18 21:11:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:45,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:11:45,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:11:45,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:11:45,453 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:11:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:45,550 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-18 21:11:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:11:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-11-18 21:11:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:45,553 INFO L225 Difference]: With dead ends: 31 [2022-11-18 21:11:45,553 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 21:11:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:11:45,555 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:45,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:11:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 21:11:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-18 21:11:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:11:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-18 21:11:45,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-11-18 21:11:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:45,565 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-18 21:11:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:11:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-18 21:11:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:11:45,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:45,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:45,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 21:11:45,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:45,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2022-11-18 21:11:45,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988306648] [2022-11-18 21:11:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:45,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581475301] [2022-11-18 21:11:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:45,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:45,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:45,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:45,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:11:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:46,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:11:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:46,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988306648] [2022-11-18 21:11:46,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:46,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581475301] [2022-11-18 21:11:46,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581475301] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:46,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:46,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-18 21:11:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253002284] [2022-11-18 21:11:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:11:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:11:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:11:46,183 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 21:11:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:46,240 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-18 21:11:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:11:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-18 21:11:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:46,242 INFO L225 Difference]: With dead ends: 33 [2022-11-18 21:11:46,242 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 21:11:46,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:11:46,244 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:46,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:11:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 21:11:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-18 21:11:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:11:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-18 21:11:46,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-11-18 21:11:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:46,259 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-18 21:11:46,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 21:11:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-18 21:11:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 21:11:46,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:46,260 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:46,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:46,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:46,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2022-11-18 21:11:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685417379] [2022-11-18 21:11:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:46,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:46,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:46,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293117904] [2022-11-18 21:11:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:46,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:46,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:46,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:11:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:11:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 21:11:46,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:50,979 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:12:11,156 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2022-11-18 21:12:29,300 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:12:49,196 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:12:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685417379] [2022-11-18 21:12:51,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293117904] [2022-11-18 21:12:51,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293117904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:51,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:51,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-18 21:12:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688990711] [2022-11-18 21:12:51,273 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:12:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:12:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=105, Unknown=6, NotChecked=92, Total=240 [2022-11-18 21:12:51,275 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 21:12:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:51,469 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-18 21:12:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:12:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2022-11-18 21:12:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:51,472 INFO L225 Difference]: With dead ends: 38 [2022-11-18 21:12:51,472 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 21:12:51,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=56, Invalid=164, Unknown=6, NotChecked=116, Total=342 [2022-11-18 21:12:51,473 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:51,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:12:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 21:12:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-18 21:12:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:12:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-18 21:12:51,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2022-11-18 21:12:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:51,501 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-18 21:12:51,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 21:12:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-18 21:12:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:12:51,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:51,505 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:51,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:51,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:51,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2022-11-18 21:12:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:51,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001797066] [2022-11-18 21:12:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:51,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:51,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127446470] [2022-11-18 21:12:51,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:12:51,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:51,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:51,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:12:51,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:12:51,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:12:51,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 21:12:52,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:56,394 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:12:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001797066] [2022-11-18 21:12:56,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127446470] [2022-11-18 21:12:56,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127446470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:56,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:56,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-18 21:12:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190328615] [2022-11-18 21:12:56,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:56,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:56,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-18 21:12:56,399 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 21:12:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:56,645 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-18 21:12:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:12:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-18 21:12:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:56,647 INFO L225 Difference]: With dead ends: 41 [2022-11-18 21:12:56,647 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 21:12:56,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2022-11-18 21:12:56,649 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:56,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:12:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 21:12:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-18 21:12:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 21:12:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-18 21:12:56,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2022-11-18 21:12:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:56,662 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-18 21:12:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 21:12:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-18 21:12:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 21:12:56,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:56,664 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:56,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 21:12:56,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:56,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2022-11-18 21:12:56,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:56,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431056268] [2022-11-18 21:12:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:56,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:56,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:56,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825545416] [2022-11-18 21:12:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:12:56,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:56,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:56,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:12:57,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:12:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 21:12:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 21:12:57,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:58,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431056268] [2022-11-18 21:12:58,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825545416] [2022-11-18 21:12:58,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825545416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:58,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:58,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-18 21:12:58,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952064478] [2022-11-18 21:12:58,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:12:58,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:58,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:12:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:12:58,125 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 21:12:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:58,401 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-18 21:12:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 21:12:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2022-11-18 21:12:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:58,405 INFO L225 Difference]: With dead ends: 44 [2022-11-18 21:12:58,405 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 21:12:58,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:12:58,407 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:58,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:12:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 21:12:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-18 21:12:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:12:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-18 21:12:58,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2022-11-18 21:12:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:58,421 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-18 21:12:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 21:12:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-18 21:12:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 21:12:58,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:58,424 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:58,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:58,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2022-11-18 21:12:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121909441] [2022-11-18 21:12:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:58,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003143450] [2022-11-18 21:12:58,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:12:58,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:58,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:58,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:12:58,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:12:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 21:12:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 21:12:58,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:59,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121909441] [2022-11-18 21:12:59,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:59,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003143450] [2022-11-18 21:12:59,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003143450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:59,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:59,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-18 21:12:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150101412] [2022-11-18 21:12:59,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:12:59,732 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 21:13:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:00,003 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-18 21:13:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:13:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2022-11-18 21:13:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:00,005 INFO L225 Difference]: With dead ends: 47 [2022-11-18 21:13:00,005 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 21:13:00,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:13:00,007 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:00,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:13:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 21:13:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-18 21:13:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 21:13:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-18 21:13:00,025 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2022-11-18 21:13:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:00,026 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-18 21:13:00,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 21:13:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-18 21:13:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 21:13:00,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:00,028 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:00,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 21:13:00,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2022-11-18 21:13:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:00,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942935903] [2022-11-18 21:13:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:00,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:00,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143322222] [2022-11-18 21:13:00,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:13:00,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:00,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:00,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:00,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:13:24,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 21:13:24,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:24,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 21:13:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 21:13:24,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:25,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942935903] [2022-11-18 21:13:25,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143322222] [2022-11-18 21:13:25,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143322222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:13:25,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:13:25,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-18 21:13:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817961625] [2022-11-18 21:13:25,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:25,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:13:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:13:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:13:25,169 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 21:13:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:25,589 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-18 21:13:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:13:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2022-11-18 21:13:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:25,594 INFO L225 Difference]: With dead ends: 50 [2022-11-18 21:13:25,594 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 21:13:25,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:13:25,598 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:13:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 21:13:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-18 21:13:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 21:13:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-18 21:13:25,626 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2022-11-18 21:13:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:25,626 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-18 21:13:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 21:13:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-18 21:13:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 21:13:25,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:25,634 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:25,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:25,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2022-11-18 21:13:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:25,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481784480] [2022-11-18 21:13:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:25,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:25,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138454397] [2022-11-18 21:13:25,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:13:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:25,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:13:30,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 21:13:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 21:13:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 21 proven. 79 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-18 21:13:31,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:31,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:31,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481784480] [2022-11-18 21:13:31,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138454397] [2022-11-18 21:13:31,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138454397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:13:31,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:13:31,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-18 21:13:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556670921] [2022-11-18 21:13:31,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:13:31,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:13:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:13:31,369 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-18 21:13:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:31,868 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-18 21:13:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:13:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2022-11-18 21:13:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:31,870 INFO L225 Difference]: With dead ends: 53 [2022-11-18 21:13:31,870 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 21:13:31,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:13:31,871 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:31,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 235 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:13:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 21:13:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 21:13:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 21:13:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-18 21:13:31,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2022-11-18 21:13:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:31,887 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-18 21:13:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-18 21:13:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-18 21:13:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 21:13:31,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:31,889 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:31,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 21:13:32,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:32,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2022-11-18 21:13:32,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:32,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796051972] [2022-11-18 21:13:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:32,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:32,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047376845] [2022-11-18 21:13:32,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:13:32,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:32,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:32,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:13:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 21:13:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 41 proven. 85 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 21:13:40,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:44,119 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:14:04,211 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 29)) 30) 0)))) is different from true [2022-11-18 21:14:22,302 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 29)) 30) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:14:26,324 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:14:34,390 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-18 21:14:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:36,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796051972] [2022-11-18 21:14:36,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:36,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047376845] [2022-11-18 21:14:36,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047376845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:14:36,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:14:36,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-18 21:14:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617202438] [2022-11-18 21:14:36,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:14:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:14:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:14:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=242, Unknown=5, NotChecked=170, Total=462 [2022-11-18 21:14:36,421 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-18 21:14:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:36,878 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-18 21:14:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:14:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2022-11-18 21:14:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:36,879 INFO L225 Difference]: With dead ends: 56 [2022-11-18 21:14:36,879 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 21:14:36,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=63, Invalid=332, Unknown=5, NotChecked=200, Total=600 [2022-11-18 21:14:36,880 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:36,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 267 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:14:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 21:14:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 21:14:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 21:14:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-11-18 21:14:36,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2022-11-18 21:14:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:36,895 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-11-18 21:14:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-18 21:14:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-11-18 21:14:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 21:14:36,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:36,897 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:36,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:37,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:37,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:14:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:37,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2022-11-18 21:14:37,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:14:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791400207] [2022-11-18 21:14:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:37,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:14:37,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:14:37,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022114541] [2022-11-18 21:14:37,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:14:37,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:14:37,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:14:37,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:14:42,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:14:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:14:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 21:14:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 23 proven. 108 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-18 21:14:42,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:14:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-18 21:14:43,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:43,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791400207] [2022-11-18 21:14:43,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:43,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022114541] [2022-11-18 21:14:43,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022114541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:14:43,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:14:43,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-18 21:14:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710217802] [2022-11-18 21:14:43,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:14:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:14:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:43,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:14:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:14:43,624 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-18 21:14:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:46,566 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2022-11-18 21:14:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 21:14:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) Word has length 85 [2022-11-18 21:14:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:46,567 INFO L225 Difference]: With dead ends: 87 [2022-11-18 21:14:46,568 INFO L226 Difference]: Without dead ends: 79 [2022-11-18 21:14:46,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 21:14:46,570 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 98 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:46,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 417 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:14:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-18 21:14:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-18 21:14:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 21:14:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-11-18 21:14:46,639 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 85 [2022-11-18 21:14:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:46,639 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-11-18 21:14:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-18 21:14:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-11-18 21:14:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-18 21:14:46,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:46,643 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:46,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:46,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:46,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:14:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1681090266, now seen corresponding path program 9 times [2022-11-18 21:14:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:14:46,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538534555] [2022-11-18 21:14:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:14:46,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:14:46,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109895035] [2022-11-18 21:14:46,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:14:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:14:46,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:14:46,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9fecd7-0667-4e9e-9394-7662ff39ef92/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process