./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:44:21,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:44:21,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:44:21,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:44:21,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:44:21,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:44:21,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:44:21,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:44:21,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:44:21,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:44:21,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:44:21,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:44:21,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:44:21,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:44:21,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:44:21,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:44:21,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:44:21,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:44:21,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:44:21,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:44:21,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:44:21,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:44:21,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:44:21,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:44:21,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:44:21,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:44:21,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:44:21,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:44:21,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:44:21,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:44:21,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:44:21,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:44:21,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:44:21,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:44:21,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:44:21,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:44:21,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:44:21,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:44:21,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:44:21,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:44:21,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:44:21,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:44:21,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:44:21,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:44:21,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:44:21,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:44:21,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:44:21,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:44:21,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:44:21,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:44:21,556 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:44:21,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:44:21,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:44:21,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:44:21,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:44:21,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:44:21,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:44:21,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:44:21,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:44:21,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:44:21,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:44:21,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:44:21,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:44:21,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:44:21,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:44:21,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:44:21,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:44:21,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:44:21,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:44:21,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:44:21,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:44:21,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:44:21,562 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:44:21,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:44:21,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:44:21,563 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_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2022-11-21 13:44:21,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:44:21,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:44:21,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:44:21,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:44:21,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:44:21,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-11-21 13:44:25,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:44:25,668 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:44:25,668 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-11-21 13:44:25,676 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/data/cb47b29a2/1cb49f6acf544dd39ee51de121326703/FLAG28ba35f41 [2022-11-21 13:44:25,694 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/data/cb47b29a2/1cb49f6acf544dd39ee51de121326703 [2022-11-21 13:44:25,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:44:25,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:44:25,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:44:25,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:44:25,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:44:25,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:25" (1/1) ... [2022-11-21 13:44:25,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652b0841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:25, skipping insertion in model container [2022-11-21 13:44:25,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:25" (1/1) ... [2022-11-21 13:44:25,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:44:25,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:44:25,932 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-11-21 13:44:25,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:44:25,995 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:44:26,047 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-11-21 13:44:26,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:44:26,079 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:44:26,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26 WrapperNode [2022-11-21 13:44:26,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:44:26,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:44:26,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:44:26,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:44:26,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,130 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-11-21 13:44:26,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:44:26,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:44:26,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:44:26,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:44:26,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:44:26,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:44:26,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:44:26,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:44:26,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (1/1) ... [2022-11-21 13:44:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:44:26,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:26,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:44:26,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:44:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:44:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 13:44:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 13:44:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:44:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:44:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:44:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 13:44:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 13:44:26,363 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:44:26,365 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:44:26,562 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:44:26,571 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:44:26,571 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 13:44:26,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:26 BoogieIcfgContainer [2022-11-21 13:44:26,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:44:26,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:44:26,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:44:26,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:44:26,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:44:25" (1/3) ... [2022-11-21 13:44:26,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f683e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:26, skipping insertion in model container [2022-11-21 13:44:26,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:26" (2/3) ... [2022-11-21 13:44:26,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f683e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:26, skipping insertion in model container [2022-11-21 13:44:26,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:26" (3/3) ... [2022-11-21 13:44:26,586 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2022-11-21 13:44:26,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:44:26,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:44:26,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:44:26,682 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;@4decf27d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:44:26,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:44:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 13:44:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 13:44:26,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:26,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:26,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-11-21 13:44:26,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:26,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32070350] [2022-11-21 13:44:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32070350] [2022-11-21 13:44:26,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:44:26,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983596570] [2022-11-21 13:44:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:26,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:26,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:44:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 13:44:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:44:26,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:26,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983596570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:26,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:26,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:44:26,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314962771] [2022-11-21 13:44:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:44:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:44:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:44:27,027 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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) [2022-11-21 13:44:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:27,063 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-11-21 13:44:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:44:27,065 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 [2022-11-21 13:44:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:27,076 INFO L225 Difference]: With dead ends: 67 [2022-11-21 13:44:27,076 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 13:44:27,081 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 [2022-11-21 13:44:27,089 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:27,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:44:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 13:44:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-21 13:44:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 13:44:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-21 13:44:27,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-11-21 13:44:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:27,147 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-21 13:44:27,147 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) [2022-11-21 13:44:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-21 13:44:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:44:27,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:27,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:27,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:44:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 13:44:27,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-11-21 13:44:27,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934530655] [2022-11-21 13:44:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:27,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:27,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864042605] [2022-11-21 13:44:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:27,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:27,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:44:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:44:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:27,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:27,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:27,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934530655] [2022-11-21 13:44:27,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864042605] [2022-11-21 13:44:27,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864042605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:27,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:27,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:44:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050583038] [2022-11-21 13:44:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:44:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:44:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:44:27,623 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-21 13:44:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:27,660 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-11-21 13:44:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:44:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 19 [2022-11-21 13:44:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:27,662 INFO L225 Difference]: With dead ends: 40 [2022-11-21 13:44:27,662 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 13:44:27,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:44:27,664 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:27,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:44:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 13:44:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-21 13:44:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 13:44:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-21 13:44:27,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-11-21 13:44:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:27,674 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-21 13:44:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-21 13:44:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-21 13:44:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 13:44:27,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:27,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:27,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-11-21 13:44:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:27,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010303841] [2022-11-21 13:44:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:27,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645666202] [2022-11-21 13:44:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:27,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:27,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:27,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:44:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:44:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:28,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010303841] [2022-11-21 13:44:28,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645666202] [2022-11-21 13:44:28,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645666202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:28,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:28,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:44:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049483851] [2022-11-21 13:44:28,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:44:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:44:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:44:28,009 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 13:44:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:28,112 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-11-21 13:44:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:44:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-21 13:44:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:28,114 INFO L225 Difference]: With dead ends: 53 [2022-11-21 13:44:28,114 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 13:44:28,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:44:28,116 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:28,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 13:44:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-11-21 13:44:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 13:44:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-21 13:44:28,126 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-11-21 13:44:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:28,126 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-21 13:44:28,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 13:44:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-21 13:44:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 13:44:28,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:28,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:28,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:28,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-11-21 13:44:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460298147] [2022-11-21 13:44:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:28,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:28,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262109542] [2022-11-21 13:44:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:28,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:28,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:28,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:44:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:44:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:28,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:28,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460298147] [2022-11-21 13:44:28,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262109542] [2022-11-21 13:44:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262109542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:28,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:44:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272645776] [2022-11-21 13:44:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:28,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:44:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:44:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:44:28,612 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-21 13:44:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:28,681 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-21 13:44:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:44:28,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 25 [2022-11-21 13:44:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:28,683 INFO L225 Difference]: With dead ends: 58 [2022-11-21 13:44:28,685 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 13:44:28,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:44:28,688 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:28,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 13:44:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-21 13:44:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 13:44:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-21 13:44:28,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-11-21 13:44:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:28,704 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-21 13:44:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-21 13:44:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-21 13:44:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 13:44:28,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:28,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:28,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:28,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-21 13:44:28,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-11-21 13:44:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490064375] [2022-11-21 13:44:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:28,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:28,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007237158] [2022-11-21 13:44:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:28,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:28,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:28,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:44:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 13:44:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:29,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490064375] [2022-11-21 13:44:29,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007237158] [2022-11-21 13:44:29,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007237158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:29,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:29,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 13:44:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396059058] [2022-11-21 13:44:29,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:44:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:44:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:44:29,224 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 13:44:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:29,334 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-21 13:44:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:44:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-21 13:44:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:29,336 INFO L225 Difference]: With dead ends: 54 [2022-11-21 13:44:29,336 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 13:44:29,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:44:29,337 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:29,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 13:44:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-21 13:44:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 13:44:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-21 13:44:29,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-11-21 13:44:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:29,349 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-21 13:44:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 13:44:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-21 13:44:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 13:44:29,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:29,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:29,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 13:44:29,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:29,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-11-21 13:44:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520707905] [2022-11-21 13:44:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:29,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123534589] [2022-11-21 13:44:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:29,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:29,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:29,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:44:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:44:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:29,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520707905] [2022-11-21 13:44:29,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123534589] [2022-11-21 13:44:29,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123534589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:29,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:29,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-21 13:44:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519126093] [2022-11-21 13:44:29,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:44:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:44:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:44:29,782 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:29,951 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-11-21 13:44:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:44:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-11-21 13:44:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:29,957 INFO L225 Difference]: With dead ends: 147 [2022-11-21 13:44:29,958 INFO L226 Difference]: Without dead ends: 140 [2022-11-21 13:44:29,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:44:29,960 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:29,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 234 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-21 13:44:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-11-21 13:44:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-21 13:44:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-11-21 13:44:30,001 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2022-11-21 13:44:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:30,002 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-11-21 13:44:30,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-11-21 13:44:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 13:44:30,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:30,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:30,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 13:44:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:30,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-11-21 13:44:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883994264] [2022-11-21 13:44:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:30,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:30,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:30,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548151071] [2022-11-21 13:44:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:30,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:30,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:30,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:30,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:44:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:44:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:30,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:30,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883994264] [2022-11-21 13:44:30,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:30,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548151071] [2022-11-21 13:44:30,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548151071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:30,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:30,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-21 13:44:30,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749929826] [2022-11-21 13:44:30,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:30,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:44:30,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:44:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:44:30,526 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 13:44:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:30,846 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-11-21 13:44:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:44:30,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-21 13:44:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:30,851 INFO L225 Difference]: With dead ends: 183 [2022-11-21 13:44:30,851 INFO L226 Difference]: Without dead ends: 171 [2022-11-21 13:44:30,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:44:30,854 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:30,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:44:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-21 13:44:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-11-21 13:44:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-21 13:44:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2022-11-21 13:44:30,897 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2022-11-21 13:44:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:30,897 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2022-11-21 13:44:30,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 13:44:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2022-11-21 13:44:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 13:44:30,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:30,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:30,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:31,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 13:44:31,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-11-21 13:44:31,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:31,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226231137] [2022-11-21 13:44:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:31,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:31,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:31,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967472805] [2022-11-21 13:44:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:31,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:31,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:31,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:44:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:44:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:31,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226231137] [2022-11-21 13:44:31,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967472805] [2022-11-21 13:44:31,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967472805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:44:31,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:44:31,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-21 13:44:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658975275] [2022-11-21 13:44:31,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:44:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:44:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:44:31,417 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 13:44:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:31,542 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2022-11-21 13:44:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:44:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-21 13:44:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:31,546 INFO L225 Difference]: With dead ends: 143 [2022-11-21 13:44:31,546 INFO L226 Difference]: Without dead ends: 141 [2022-11-21 13:44:31,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:44:31,548 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:31,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-21 13:44:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-11-21 13:44:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-21 13:44:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-11-21 13:44:31,587 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2022-11-21 13:44:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:31,588 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-11-21 13:44:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 13:44:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-11-21 13:44:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 13:44:31,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:31,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:31,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 13:44:31,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:31,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-11-21 13:44:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:31,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117299399] [2022-11-21 13:44:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:31,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:31,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781272783] [2022-11-21 13:44:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:31,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:31,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:31,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:44:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 13:44:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:32,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117299399] [2022-11-21 13:44:32,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781272783] [2022-11-21 13:44:32,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781272783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:32,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:32,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2022-11-21 13:44:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056445183] [2022-11-21 13:44:32,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:32,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:44:32,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:44:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:44:32,258 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:32,619 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-11-21 13:44:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:44:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-21 13:44:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:32,622 INFO L225 Difference]: With dead ends: 183 [2022-11-21 13:44:32,622 INFO L226 Difference]: Without dead ends: 181 [2022-11-21 13:44:32,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:44:32,625 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 124 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:32,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 343 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:44:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-21 13:44:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2022-11-21 13:44:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-21 13:44:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2022-11-21 13:44:32,664 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2022-11-21 13:44:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:32,664 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2022-11-21 13:44:32,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2022-11-21 13:44:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 13:44:32,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:32,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:32,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:32,873 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-11-21 13:44:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:32,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658575433] [2022-11-21 13:44:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:32,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132129532] [2022-11-21 13:44:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:32,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:32,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:32,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:44:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:44:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:33,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:33,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658575433] [2022-11-21 13:44:33,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132129532] [2022-11-21 13:44:33,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132129532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:33,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:33,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:44:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779392467] [2022-11-21 13:44:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:44:33,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:44:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:44:33,013 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-21 13:44:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:33,071 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-11-21 13:44:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:44:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 32 [2022-11-21 13:44:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:33,072 INFO L225 Difference]: With dead ends: 237 [2022-11-21 13:44:33,073 INFO L226 Difference]: Without dead ends: 170 [2022-11-21 13:44:33,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:44:33,074 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:33,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:44:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-21 13:44:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-21 13:44:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-21 13:44:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2022-11-21 13:44:33,105 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2022-11-21 13:44:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:33,106 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2022-11-21 13:44:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-11-21 13:44:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2022-11-21 13:44:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 13:44:33,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:33,107 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:33,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:33,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-11-21 13:44:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:33,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62012126] [2022-11-21 13:44:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:33,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403369475] [2022-11-21 13:44:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:33,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:33,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:44:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:44:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:44:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 13:44:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62012126] [2022-11-21 13:44:33,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403369475] [2022-11-21 13:44:33,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403369475] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:44:33,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:44:33,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-21 13:44:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765488148] [2022-11-21 13:44:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:33,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:44:33,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:44:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:44:33,629 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:33,774 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2022-11-21 13:44:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:44:33,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-21 13:44:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:33,778 INFO L225 Difference]: With dead ends: 235 [2022-11-21 13:44:33,778 INFO L226 Difference]: Without dead ends: 233 [2022-11-21 13:44:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:44:33,781 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:33,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 160 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-21 13:44:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2022-11-21 13:44:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-21 13:44:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2022-11-21 13:44:33,842 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2022-11-21 13:44:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:33,843 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2022-11-21 13:44:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2022-11-21 13:44:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 13:44:33,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:33,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:34,056 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-11-21 13:44:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431734235] [2022-11-21 13:44:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:34,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192574338] [2022-11-21 13:44:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:34,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:34,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:34,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:44:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 13:44:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:44:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431734235] [2022-11-21 13:44:35,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192574338] [2022-11-21 13:44:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192574338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:35,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:35,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2022-11-21 13:44:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788977829] [2022-11-21 13:44:35,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 13:44:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 13:44:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:44:35,222 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 13:44:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:49,261 INFO L93 Difference]: Finished difference Result 370 states and 531 transitions. [2022-11-21 13:44:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 13:44:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2022-11-21 13:44:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:49,266 INFO L225 Difference]: With dead ends: 370 [2022-11-21 13:44:49,266 INFO L226 Difference]: Without dead ends: 368 [2022-11-21 13:44:49,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 13:44:49,268 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 260 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:49,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 349 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-21 13:44:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-21 13:44:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 315. [2022-11-21 13:44:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 235 states have (on average 1.3914893617021276) internal successors, (327), 242 states have internal predecessors, (327), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-21 13:44:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 452 transitions. [2022-11-21 13:44:49,359 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 452 transitions. Word has length 37 [2022-11-21 13:44:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:49,359 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 452 transitions. [2022-11-21 13:44:49,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 13:44:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 452 transitions. [2022-11-21 13:44:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 13:44:49,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:49,361 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:49,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:44:49,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-11-21 13:44:49,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:49,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922950393] [2022-11-21 13:44:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:49,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:49,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167189124] [2022-11-21 13:44:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:49,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:49,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:49,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:44:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:44:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 13:44:49,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:44:50,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922950393] [2022-11-21 13:44:50,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167189124] [2022-11-21 13:44:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167189124] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:44:50,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:44:50,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-21 13:44:50,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635943258] [2022-11-21 13:44:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:44:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:44:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:44:50,332 INFO L87 Difference]: Start difference. First operand 315 states and 452 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 13:44:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:50,490 INFO L93 Difference]: Finished difference Result 324 states and 460 transitions. [2022-11-21 13:44:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:44:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-21 13:44:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:50,493 INFO L225 Difference]: With dead ends: 324 [2022-11-21 13:44:50,493 INFO L226 Difference]: Without dead ends: 322 [2022-11-21 13:44:50,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:44:50,496 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:50,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:44:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-21 13:44:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2022-11-21 13:44:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 245 states have internal predecessors, (328), 63 states have call successors, (63), 17 states have call predecessors, (63), 17 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-21 13:44:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 453 transitions. [2022-11-21 13:44:50,593 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 453 transitions. Word has length 40 [2022-11-21 13:44:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:50,593 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 453 transitions. [2022-11-21 13:44:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 13:44:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 453 transitions. [2022-11-21 13:44:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 13:44:50,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:50,595 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:50,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:44:50,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-11-21 13:44:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029386372] [2022-11-21 13:44:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:50,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:50,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84315935] [2022-11-21 13:44:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:50,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:50,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 13:44:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:50,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:44:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:44:50,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:44:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:51,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029386372] [2022-11-21 13:44:51,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:51,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84315935] [2022-11-21 13:44:51,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84315935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:51,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:51,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-21 13:44:51,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602395878] [2022-11-21 13:44:51,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:51,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:44:51,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:44:51,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:44:51,047 INFO L87 Difference]: Start difference. First operand 319 states and 453 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:51,461 INFO L93 Difference]: Finished difference Result 781 states and 1094 transitions. [2022-11-21 13:44:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:44:51,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-21 13:44:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:51,469 INFO L225 Difference]: With dead ends: 781 [2022-11-21 13:44:51,470 INFO L226 Difference]: Without dead ends: 592 [2022-11-21 13:44:51,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:44:51,473 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 162 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:51,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 331 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:44:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-21 13:44:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 562. [2022-11-21 13:44:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 406 states have (on average 1.3177339901477831) internal successors, (535), 416 states have internal predecessors, (535), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-21 13:44:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 759 transitions. [2022-11-21 13:44:51,637 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 759 transitions. Word has length 38 [2022-11-21 13:44:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:51,639 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 759 transitions. [2022-11-21 13:44:51,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 759 transitions. [2022-11-21 13:44:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 13:44:51,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:51,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:51,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-21 13:44:51,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:44:51,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2022-11-21 13:44:51,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001411102] [2022-11-21 13:44:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:51,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658437310] [2022-11-21 13:44:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:44:51,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:51,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:51,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:51,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 13:44:51,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:44:51,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:44:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:44:51,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:51,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:44:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001411102] [2022-11-21 13:44:51,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658437310] [2022-11-21 13:44:51,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658437310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:44:51,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:44:51,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:44:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735997594] [2022-11-21 13:44:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:44:51,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:44:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:44:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:44:51,959 INFO L87 Difference]: Start difference. First operand 562 states and 759 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-11-21 13:44:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:52,210 INFO L93 Difference]: Finished difference Result 874 states and 1229 transitions. [2022-11-21 13:44:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:44:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 39 [2022-11-21 13:44:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:52,214 INFO L225 Difference]: With dead ends: 874 [2022-11-21 13:44:52,214 INFO L226 Difference]: Without dead ends: 679 [2022-11-21 13:44:52,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:44:52,216 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:52,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:44:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-11-21 13:44:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 553. [2022-11-21 13:44:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 401 states have (on average 1.3167082294264338) internal successors, (528), 411 states have internal predecessors, (528), 110 states have call successors, (110), 41 states have call predecessors, (110), 41 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-21 13:44:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2022-11-21 13:44:52,354 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2022-11-21 13:44:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:52,354 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2022-11-21 13:44:52,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-11-21 13:44:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2022-11-21 13:44:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-21 13:44:52,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:52,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:52,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:52,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:52,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2022-11-21 13:44:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643132217] [2022-11-21 13:44:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:52,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101686624] [2022-11-21 13:44:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:52,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:52,586 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:52,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 13:44:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:44:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:52,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 13:44:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643132217] [2022-11-21 13:44:52,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101686624] [2022-11-21 13:44:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101686624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:52,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:52,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-21 13:44:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157133802] [2022-11-21 13:44:52,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:44:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:44:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:44:52,822 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:44:53,371 INFO L93 Difference]: Finished difference Result 1157 states and 1577 transitions. [2022-11-21 13:44:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:44:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-21 13:44:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:44:53,376 INFO L225 Difference]: With dead ends: 1157 [2022-11-21 13:44:53,377 INFO L226 Difference]: Without dead ends: 817 [2022-11-21 13:44:53,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-11-21 13:44:53,378 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 227 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:44:53,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 377 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:44:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-21 13:44:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2022-11-21 13:44:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-21 13:44:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2022-11-21 13:44:53,558 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2022-11-21 13:44:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:44:53,558 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2022-11-21 13:44:53,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 13:44:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2022-11-21 13:44:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 13:44:53,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:44:53,559 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:44:53,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 13:44:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 13:44:53,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:44:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:44:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-11-21 13:44:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:44:53,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011251768] [2022-11-21 13:44:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:53,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:44:53,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:44:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920283064] [2022-11-21 13:44:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:44:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:44:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:44:53,786 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:44:53,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 13:44:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:44:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-21 13:44:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:44:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:44:54,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:44:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-21 13:44:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:44:56,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011251768] [2022-11-21 13:44:56,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:44:56,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920283064] [2022-11-21 13:44:56,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920283064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:44:56,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:44:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2022-11-21 13:44:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437026895] [2022-11-21 13:44:56,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:44:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 13:44:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:44:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 13:44:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-11-21 13:44:56,273 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-21 13:45:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:45:16,935 INFO L93 Difference]: Finished difference Result 1403 states and 1876 transitions. [2022-11-21 13:45:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 13:45:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 54 [2022-11-21 13:45:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:45:16,940 INFO L225 Difference]: With dead ends: 1403 [2022-11-21 13:45:16,940 INFO L226 Difference]: Without dead ends: 1060 [2022-11-21 13:45:16,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 13:45:16,942 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 284 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:45:16,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 659 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-21 13:45:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-21 13:45:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 909. [2022-11-21 13:45:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 664 states have (on average 1.2725903614457832) internal successors, (845), 673 states have internal predecessors, (845), 180 states have call successors, (180), 64 states have call predecessors, (180), 64 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2022-11-21 13:45:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1201 transitions. [2022-11-21 13:45:17,238 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1201 transitions. Word has length 54 [2022-11-21 13:45:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:45:17,238 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1201 transitions. [2022-11-21 13:45:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-21 13:45:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1201 transitions. [2022-11-21 13:45:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-21 13:45:17,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:45:17,240 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:45:17,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-21 13:45:17,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:45:17,445 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:45:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2022-11-21 13:45:17,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920910350] [2022-11-21 13:45:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:17,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:45:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72290887] [2022-11-21 13:45:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:17,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:17,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:17,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 13:45:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:45:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 13:45:17,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 13:45:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920910350] [2022-11-21 13:45:17,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:45:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72290887] [2022-11-21 13:45:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72290887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:17,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:45:17,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-21 13:45:17,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300988297] [2022-11-21 13:45:17,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:17,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:45:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:45:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:45:17,770 INFO L87 Difference]: Start difference. First operand 909 states and 1201 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-21 13:45:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:45:18,447 INFO L93 Difference]: Finished difference Result 992 states and 1291 transitions. [2022-11-21 13:45:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:45:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-11-21 13:45:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:45:18,451 INFO L225 Difference]: With dead ends: 992 [2022-11-21 13:45:18,451 INFO L226 Difference]: Without dead ends: 970 [2022-11-21 13:45:18,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-11-21 13:45:18,453 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:45:18,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 322 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:45:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-11-21 13:45:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 941. [2022-11-21 13:45:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 697 states have (on average 1.2467718794835008) internal successors, (869), 705 states have internal predecessors, (869), 179 states have call successors, (179), 64 states have call predecessors, (179), 64 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2022-11-21 13:45:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1224 transitions. [2022-11-21 13:45:18,753 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1224 transitions. Word has length 60 [2022-11-21 13:45:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:45:18,753 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1224 transitions. [2022-11-21 13:45:18,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-21 13:45:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1224 transitions. [2022-11-21 13:45:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 13:45:18,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:45:18,755 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:45:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:18,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:45:18,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:45:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2022-11-21 13:45:18,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:18,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340460489] [2022-11-21 13:45:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:18,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:45:18,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142882503] [2022-11-21 13:45:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:18,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:18,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 13:45:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:19,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 13:45:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:45:20,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-21 13:45:20,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340460489] [2022-11-21 13:45:20,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:45:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142882503] [2022-11-21 13:45:20,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142882503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:20,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:45:20,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-21 13:45:20,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052007823] [2022-11-21 13:45:20,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:20,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 13:45:20,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 13:45:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-21 13:45:20,688 INFO L87 Difference]: Start difference. First operand 941 states and 1224 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-21 13:45:32,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:45:39,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:46:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:46:23,082 INFO L93 Difference]: Finished difference Result 1283 states and 1739 transitions. [2022-11-21 13:46:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 13:46:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 66 [2022-11-21 13:46:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:46:23,088 INFO L225 Difference]: With dead ends: 1283 [2022-11-21 13:46:23,088 INFO L226 Difference]: Without dead ends: 1281 [2022-11-21 13:46:23,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=573, Invalid=2967, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 13:46:23,090 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 341 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 303 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:46:23,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 750 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1617 Invalid, 1 Unknown, 0 Unchecked, 24.8s Time] [2022-11-21 13:46:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-11-21 13:46:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1014. [2022-11-21 13:46:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 757 states have (on average 1.261558784676354) internal successors, (955), 771 states have internal predecessors, (955), 189 states have call successors, (189), 67 states have call predecessors, (189), 67 states have return successors, (186), 175 states have call predecessors, (186), 186 states have call successors, (186) [2022-11-21 13:46:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1330 transitions. [2022-11-21 13:46:23,447 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1330 transitions. Word has length 66 [2022-11-21 13:46:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:46:23,448 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 1330 transitions. [2022-11-21 13:46:23,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-21 13:46:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1330 transitions. [2022-11-21 13:46:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 13:46:23,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:46:23,449 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:46:23,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 13:46:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:46:23,656 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:46:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:46:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2022-11-21 13:46:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:46:23,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128203586] [2022-11-21 13:46:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:46:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:46:23,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:46:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29845309] [2022-11-21 13:46:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:46:23,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:46:23,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:46:23,676 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:46:23,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 13:46:23,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:46:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:46:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:46:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:46:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:46:23,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:46:23,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:46:23,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128203586] [2022-11-21 13:46:23,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:46:23,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29845309] [2022-11-21 13:46:23,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29845309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:46:23,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:46:23,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:46:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418608512] [2022-11-21 13:46:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:46:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:46:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:46:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:46:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:46:23,813 INFO L87 Difference]: Start difference. First operand 1014 states and 1330 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:46:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:46:24,382 INFO L93 Difference]: Finished difference Result 1679 states and 2279 transitions. [2022-11-21 13:46:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:46:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-11-21 13:46:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:46:24,388 INFO L225 Difference]: With dead ends: 1679 [2022-11-21 13:46:24,389 INFO L226 Difference]: Without dead ends: 1160 [2022-11-21 13:46:24,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:46:24,391 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:46:24,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:46:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-11-21 13:46:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1102. [2022-11-21 13:46:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 809 states have (on average 1.2632880098887516) internal successors, (1022), 821 states have internal predecessors, (1022), 225 states have call successors, (225), 67 states have call predecessors, (225), 67 states have return successors, (222), 213 states have call predecessors, (222), 222 states have call successors, (222) [2022-11-21 13:46:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1469 transitions. [2022-11-21 13:46:25,025 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1469 transitions. Word has length 69 [2022-11-21 13:46:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:46:25,026 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1469 transitions. [2022-11-21 13:46:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 13:46:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1469 transitions. [2022-11-21 13:46:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 13:46:25,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:46:25,028 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:46:25,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-21 13:46:25,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:46:25,234 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:46:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:46:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2022-11-21 13:46:25,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:46:25,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686883777] [2022-11-21 13:46:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:46:25,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:46:25,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:46:25,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629338398] [2022-11-21 13:46:25,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:46:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:46:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:46:25,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:46:25,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 13:46:25,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 13:46:25,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:46:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-21 13:46:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:46:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-21 13:46:26,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:46:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-21 13:46:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:46:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686883777] [2022-11-21 13:46:29,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:46:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629338398] [2022-11-21 13:46:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629338398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:46:29,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:46:29,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-11-21 13:46:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33983393] [2022-11-21 13:46:29,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:46:29,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 13:46:29,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:46:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 13:46:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-21 13:46:29,401 INFO L87 Difference]: Start difference. First operand 1102 states and 1469 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-21 13:47:13,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:47:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:47:15,948 INFO L93 Difference]: Finished difference Result 1569 states and 2162 transitions. [2022-11-21 13:47:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 13:47:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 71 [2022-11-21 13:47:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:47:15,955 INFO L225 Difference]: With dead ends: 1569 [2022-11-21 13:47:15,955 INFO L226 Difference]: Without dead ends: 1567 [2022-11-21 13:47:15,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=978, Invalid=3578, Unknown=0, NotChecked=0, Total=4556 [2022-11-21 13:47:15,958 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 638 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 543 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:47:15,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1087 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 1574 Invalid, 1 Unknown, 0 Unchecked, 20.1s Time] [2022-11-21 13:47:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2022-11-21 13:47:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1310. [2022-11-21 13:47:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 972 states have (on average 1.2808641975308641) internal successors, (1245), 988 states have internal predecessors, (1245), 258 states have call successors, (258), 79 states have call predecessors, (258), 79 states have return successors, (255), 242 states have call predecessors, (255), 255 states have call successors, (255) [2022-11-21 13:47:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1758 transitions. [2022-11-21 13:47:16,710 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1758 transitions. Word has length 71 [2022-11-21 13:47:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:47:16,711 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1758 transitions. [2022-11-21 13:47:16,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-21 13:47:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1758 transitions. [2022-11-21 13:47:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-21 13:47:16,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:47:16,718 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:16,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-21 13:47:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 13:47:16,923 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:47:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2022-11-21 13:47:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799276801] [2022-11-21 13:47:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:16,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:47:16,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283881029] [2022-11-21 13:47:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:16,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:16,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:16,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 13:47:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 13:47:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-21 13:47:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-21 13:47:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799276801] [2022-11-21 13:47:18,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:47:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283881029] [2022-11-21 13:47:18,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283881029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:18,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:47:18,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-21 13:47:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626796338] [2022-11-21 13:47:18,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:18,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 13:47:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 13:47:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-21 13:47:18,098 INFO L87 Difference]: Start difference. First operand 1310 states and 1758 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-21 13:47:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:47:22,372 INFO L93 Difference]: Finished difference Result 2025 states and 2895 transitions. [2022-11-21 13:47:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 13:47:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2022-11-21 13:47:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:47:22,382 INFO L225 Difference]: With dead ends: 2025 [2022-11-21 13:47:22,382 INFO L226 Difference]: Without dead ends: 2023 [2022-11-21 13:47:22,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 13:47:22,384 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 272 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:47:22,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 700 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 13:47:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-21 13:47:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1821. [2022-11-21 13:47:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1231 states have (on average 1.3330625507717302) internal successors, (1641), 1247 states have internal predecessors, (1641), 502 states have call successors, (502), 87 states have call predecessors, (502), 87 states have return successors, (499), 486 states have call predecessors, (499), 499 states have call successors, (499) [2022-11-21 13:47:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2642 transitions. [2022-11-21 13:47:23,436 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2642 transitions. Word has length 85 [2022-11-21 13:47:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:47:23,436 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2642 transitions. [2022-11-21 13:47:23,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-21 13:47:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2642 transitions. [2022-11-21 13:47:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-21 13:47:23,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:47:23,438 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:23,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:23,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 13:47:23,643 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:47:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2022-11-21 13:47:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965170932] [2022-11-21 13:47:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:23,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:47:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378797261] [2022-11-21 13:47:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:23,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:23,653 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:23,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 13:47:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 13:47:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-21 13:47:24,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:47:29,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:29,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965170932] [2022-11-21 13:47:29,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:47:29,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378797261] [2022-11-21 13:47:29,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378797261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:29,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:47:29,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-11-21 13:47:29,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229678300] [2022-11-21 13:47:29,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 13:47:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 13:47:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 13:47:29,131 INFO L87 Difference]: Start difference. First operand 1821 states and 2642 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-21 13:47:35,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:49:07,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:49:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:49:24,640 INFO L93 Difference]: Finished difference Result 3053 states and 4627 transitions. [2022-11-21 13:49:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-21 13:49:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2022-11-21 13:49:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:49:24,651 INFO L225 Difference]: With dead ends: 3053 [2022-11-21 13:49:24,651 INFO L226 Difference]: Without dead ends: 3036 [2022-11-21 13:49:24,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=2693, Invalid=11349, Unknown=0, NotChecked=0, Total=14042 [2022-11-21 13:49:24,656 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 667 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 702 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:49:24,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1069 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 2830 Invalid, 1 Unknown, 0 Unchecked, 41.3s Time] [2022-11-21 13:49:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-11-21 13:49:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2141. [2022-11-21 13:49:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 1468 states have (on average 1.3583106267029972) internal successors, (1994), 1485 states have internal predecessors, (1994), 583 states have call successors, (583), 89 states have call predecessors, (583), 89 states have return successors, (580), 566 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-21 13:49:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3157 transitions. [2022-11-21 13:49:26,637 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3157 transitions. Word has length 84 [2022-11-21 13:49:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:49:26,638 INFO L495 AbstractCegarLoop]: Abstraction has 2141 states and 3157 transitions. [2022-11-21 13:49:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-21 13:49:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3157 transitions. [2022-11-21 13:49:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-21 13:49:26,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:49:26,640 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:26,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:26,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:26,842 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:49:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1186023176, now seen corresponding path program 1 times [2022-11-21 13:49:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:26,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888597475] [2022-11-21 13:49:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:26,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:26,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:49:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369731749] [2022-11-21 13:49:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:26,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:26,853 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:26,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 13:49:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 13:49:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-21 13:49:28,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-21 13:49:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888597475] [2022-11-21 13:49:29,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:49:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369731749] [2022-11-21 13:49:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369731749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:29,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:49:29,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2022-11-21 13:49:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085940360] [2022-11-21 13:49:29,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 13:49:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 13:49:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-21 13:49:29,769 INFO L87 Difference]: Start difference. First operand 2141 states and 3157 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-21 13:49:43,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:49:48,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:49:56,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:49:58,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:50:28,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:50:30,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 13:50:44,837 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 13:51:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:51:14,471 INFO L93 Difference]: Finished difference Result 2934 states and 4443 transitions. [2022-11-21 13:51:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 13:51:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 87 [2022-11-21 13:51:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:51:14,481 INFO L225 Difference]: With dead ends: 2934 [2022-11-21 13:51:14,482 INFO L226 Difference]: Without dead ends: 2928 [2022-11-21 13:51:14,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=1488, Invalid=5318, Unknown=0, NotChecked=0, Total=6806 [2022-11-21 13:51:14,487 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 464 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 455 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:51:14,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1229 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2068 Invalid, 6 Unknown, 0 Unchecked, 43.4s Time] [2022-11-21 13:51:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2022-11-21 13:51:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2515. [2022-11-21 13:51:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 1695 states have (on average 1.3769911504424779) internal successors, (2334), 1712 states have internal predecessors, (2334), 722 states have call successors, (722), 98 states have call predecessors, (722), 97 states have return successors, (720), 704 states have call predecessors, (720), 720 states have call successors, (720) [2022-11-21 13:51:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3776 transitions. [2022-11-21 13:51:17,304 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3776 transitions. Word has length 87 [2022-11-21 13:51:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:51:17,304 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 3776 transitions. [2022-11-21 13:51:17,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-21 13:51:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3776 transitions. [2022-11-21 13:51:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-21 13:51:17,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:51:17,307 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:17,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:17,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 13:51:17,513 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:51:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash 704622192, now seen corresponding path program 1 times [2022-11-21 13:51:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803719619] [2022-11-21 13:51:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:17,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:51:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845088587] [2022-11-21 13:51:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:17,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:17,526 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:17,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 13:51:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 13:51:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-21 13:51:17,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-21 13:51:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:18,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803719619] [2022-11-21 13:51:18,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:51:18,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845088587] [2022-11-21 13:51:18,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845088587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:18,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:51:18,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2022-11-21 13:51:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995799058] [2022-11-21 13:51:18,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:51:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:51:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:51:18,076 INFO L87 Difference]: Start difference. First operand 2515 states and 3776 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-21 13:51:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:51:21,236 INFO L93 Difference]: Finished difference Result 3642 states and 5606 transitions. [2022-11-21 13:51:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:51:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2022-11-21 13:51:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:51:21,248 INFO L225 Difference]: With dead ends: 3642 [2022-11-21 13:51:21,249 INFO L226 Difference]: Without dead ends: 2505 [2022-11-21 13:51:21,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:51:21,254 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 207 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:51:21,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 302 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:51:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-11-21 13:51:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2498. [2022-11-21 13:51:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1686 states have (on average 1.3641755634638197) internal successors, (2300), 1703 states have internal predecessors, (2300), 714 states have call successors, (714), 98 states have call predecessors, (714), 97 states have return successors, (712), 696 states have call predecessors, (712), 712 states have call successors, (712) [2022-11-21 13:51:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3726 transitions. [2022-11-21 13:51:24,002 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3726 transitions. Word has length 93 [2022-11-21 13:51:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:51:24,002 INFO L495 AbstractCegarLoop]: Abstraction has 2498 states and 3726 transitions. [2022-11-21 13:51:24,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-21 13:51:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3726 transitions. [2022-11-21 13:51:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-21 13:51:24,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:51:24,006 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:24,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-21 13:51:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 13:51:24,213 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:51:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 784770345, now seen corresponding path program 2 times [2022-11-21 13:51:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:24,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483149228] [2022-11-21 13:51:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:24,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:51:24,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685578910] [2022-11-21 13:51:24,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:51:24,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:24,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:24,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:24,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-21 13:51:24,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:51:24,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-21 13:51:24,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:51:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:51:24,405 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:51:24,405 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:51:24,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 13:51:24,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:24,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 13:51:24,618 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:24,622 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 13:51:24,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:51:24 BoogieIcfgContainer [2022-11-21 13:51:24,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 13:51:24,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 13:51:24,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 13:51:24,686 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 13:51:24,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:26" (3/4) ... [2022-11-21 13:51:24,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 13:51:24,795 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 13:51:24,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 13:51:24,796 INFO L158 Benchmark]: Toolchain (without parser) took 419097.17ms. Allocated memory was 180.4MB in the beginning and 1.0GB in the end (delta: 864.0MB). Free memory was 150.0MB in the beginning and 483.0MB in the end (delta: -332.9MB). Peak memory consumption was 530.0MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,796 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 125.8MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:51:24,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.14ms. Allocated memory is still 180.4MB. Free memory was 150.0MB in the beginning and 148.6MB in the end (delta: 1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,797 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.08ms. Allocated memory is still 180.4MB. Free memory was 148.6MB in the beginning and 147.7MB in the end (delta: 961.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,797 INFO L158 Benchmark]: Boogie Preprocessor took 26.22ms. Allocated memory is still 180.4MB. Free memory was 147.7MB in the beginning and 146.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:51:24,797 INFO L158 Benchmark]: RCFGBuilder took 415.55ms. Allocated memory is still 180.4MB. Free memory was 146.5MB in the beginning and 133.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,798 INFO L158 Benchmark]: TraceAbstraction took 418107.97ms. Allocated memory was 180.4MB in the beginning and 1.0GB in the end (delta: 864.0MB). Free memory was 133.0MB in the beginning and 488.2MB in the end (delta: -355.2MB). Peak memory consumption was 510.8MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,798 INFO L158 Benchmark]: Witness Printer took 109.93ms. Allocated memory is still 1.0GB. Free memory was 488.2MB in the beginning and 483.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-21 13:51:24,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 125.8MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 379.14ms. Allocated memory is still 180.4MB. Free memory was 150.0MB in the beginning and 148.6MB in the end (delta: 1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.08ms. Allocated memory is still 180.4MB. Free memory was 148.6MB in the beginning and 147.7MB in the end (delta: 961.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.22ms. Allocated memory is still 180.4MB. Free memory was 147.7MB in the beginning and 146.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 415.55ms. Allocated memory is still 180.4MB. Free memory was 146.5MB in the beginning and 133.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 418107.97ms. Allocated memory was 180.4MB in the beginning and 1.0GB in the end (delta: 864.0MB). Free memory was 133.0MB in the beginning and 488.2MB in the end (delta: -355.2MB). Peak memory consumption was 510.8MB. Max. memory is 16.1GB. * Witness Printer took 109.93ms. Allocated memory is still 1.0GB. Free memory was 488.2MB in the beginning and 483.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [a=3, b=5, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=5, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=5, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] EXPR counter++ VAL [a=5, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] EXPR counter++ VAL [a=5, b=3, c=5, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [a=5, b=3, c=5, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [a=5, b=3, c=2, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] EXPR counter++ VAL [a=5, b=3, c=2, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=5, b=3, c=2, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=2, c=2, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] EXPR counter++ VAL [a=3, b=2, c=2, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [a=3, b=2, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=2, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=2, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] EXPR counter++ VAL [a=2, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 418.0s, OverallIterations: 26, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 375.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 4302 SdHoareTripleChecker+Valid, 148.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4249 mSDsluCounter, 9515 SdHoareTripleChecker+Invalid, 146.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8067 mSDsCounter, 3027 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12866 IncrementalHoareTripleChecker+Invalid, 15902 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3027 mSolverCounterUnsat, 1448 mSDtfsCounter, 12866 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2358 GetRequests, 1706 SyntacticMatches, 26 SemanticMatches, 626 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11029 ImplicationChecksByTransitivity, 224.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2515occurred in iteration=24, InterpolantAutomatonStates: 519, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 11.9s AutomataMinimizationTime, 25 MinimizatonAttempts, 2646 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 1263 NumberOfCodeBlocks, 1248 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1984 ConstructedInterpolants, 4 QuantifiedInterpolants, 15064 SizeOfPredicates, 145 NumberOfNonLiveVariables, 3752 ConjunctsInSsa, 552 ConjunctsInUnsatCore, 41 InterpolantComputations, 10 PerfectInterpolantSequences, 1835/2403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-21 13:51:24,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239984dc-3711-4621-9219-03759d90ff34/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE