./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8 --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 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c --- 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-e04fb08 [2022-11-16 12:09:12,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:09:12,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:09:12,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:09:12,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:09:12,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:09:12,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:09:12,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:09:12,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:09:12,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:09:12,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:09:12,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:09:12,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:09:12,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:09:12,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:09:12,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:09:12,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:09:12,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:09:12,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:09:12,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:09:12,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:09:12,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:09:12,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:09:12,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:09:12,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:09:12,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:09:12,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:09:12,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:09:12,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:09:12,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:09:12,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:09:12,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:09:12,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:09:12,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:09:12,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:09:12,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:09:12,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:09:12,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:09:12,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:09:12,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:09:12,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:09:12,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:09:12,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:09:12,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:09:12,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:09:12,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:09:12,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:09:12,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:09:12,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:09:12,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:09:12,640 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:09:12,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:09:12,642 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:09:12,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:09:12,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:09:12,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:09:12,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:09:12,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:09:12,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:09:12,645 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:09:12,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:09:12,645 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:09:12,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:09:12,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:09:12,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:09:12,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:09:12,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:09:12,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:09:12,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:09:12,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:09:12,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:09:12,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:09:12,649 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:09:12,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:09:12,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:09:12,650 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_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1619c1c02ba7c9b660af32e6427e3b3d5cd6ca3ff286b9db386918ae0c8b508c [2022-11-16 12:09:12,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:09:13,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:09:13,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:09:13,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:09:13,016 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:09:13,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2022-11-16 12:09:13,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/data/7c398b66e/a13e9a03be4e4ec3a51096f3b290d801/FLAG78ce8e2fa [2022-11-16 12:09:13,598 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:09:13,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2022-11-16 12:09:13,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/data/7c398b66e/a13e9a03be4e4ec3a51096f3b290d801/FLAG78ce8e2fa [2022-11-16 12:09:13,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/data/7c398b66e/a13e9a03be4e4ec3a51096f3b290d801 [2022-11-16 12:09:13,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:09:13,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:09:13,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:09:13,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:09:13,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:09:13,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:09:13" (1/1) ... [2022-11-16 12:09:13,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481ffb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:13, skipping insertion in model container [2022-11-16 12:09:13,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:09:13" (1/1) ... [2022-11-16 12:09:13,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:09:13,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:09:14,227 WARN L229 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_285d1a47-050e-4691-b2be-07917640600b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2022-11-16 12:09:14,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:09:14,256 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:09:14,273 WARN L229 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_285d1a47-050e-4691-b2be-07917640600b/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2022-11-16 12:09:14,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:09:14,297 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:09:14,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14 WrapperNode [2022-11-16 12:09:14,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:09:14,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:09:14,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:09:14,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:09:14,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,331 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-16 12:09:14,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:09:14,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:09:14,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:09:14,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:09:14,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:09:14,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:09:14,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:09:14,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:09:14,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (1/1) ... [2022-11-16 12:09:14,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:09:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:14,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:09:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:09:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:09:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:09:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:09:14,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:09:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:09:14,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:09:14,540 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:09:14,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:09:14,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:09:14,810 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:09:14,812 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:09:14,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:09:14 BoogieIcfgContainer [2022-11-16 12:09:14,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:09:14,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:09:14,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:09:14,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:09:14,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:09:13" (1/3) ... [2022-11-16 12:09:14,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f08fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:09:14, skipping insertion in model container [2022-11-16 12:09:14,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:09:14" (2/3) ... [2022-11-16 12:09:14,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f08fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:09:14, skipping insertion in model container [2022-11-16 12:09:14,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:09:14" (3/3) ... [2022-11-16 12:09:14,829 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2022-11-16 12:09:14,851 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:09:14,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:09:14,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:09:14,948 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;@1f8e58e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:09:14,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:09:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:09:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:09:14,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:14,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:14,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2022-11-16 12:09:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:14,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797732823] [2022-11-16 12:09:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:15,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797732823] [2022-11-16 12:09:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797732823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:15,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:15,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540704668] [2022-11-16 12:09:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:09:15,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:09:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:09:15,171 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:15,205 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2022-11-16 12:09:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:09:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:09:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:15,223 INFO L225 Difference]: With dead ends: 49 [2022-11-16 12:09:15,224 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 12:09:15,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:09:15,233 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-11-16 12:09:15,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:09:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 12:09:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-16 12:09:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:09:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-16 12:09:15,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2022-11-16 12:09:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:15,291 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-16 12:09:15,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-16 12:09:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:09:15,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:15,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:15,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:09:15,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2022-11-16 12:09:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:15,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102517827] [2022-11-16 12:09:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:15,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:15,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102517827] [2022-11-16 12:09:15,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102517827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:15,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:15,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:09:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138585988] [2022-11-16 12:09:15,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:15,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:09:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:09:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:15,475 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:15,541 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-16 12:09:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:09:15,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:09:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:15,543 INFO L225 Difference]: With dead ends: 35 [2022-11-16 12:09:15,543 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:09:15,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:09:15,545 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:15,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:09:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:09:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-11-16 12:09:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-11-16 12:09:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-16 12:09:15,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2022-11-16 12:09:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:15,556 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-16 12:09:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-16 12:09:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:09:15,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:15,557 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:15,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:09:15,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2022-11-16 12:09:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310851083] [2022-11-16 12:09:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:15,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:09:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310851083] [2022-11-16 12:09:15,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310851083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:15,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:15,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:09:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030990870] [2022-11-16 12:09:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:15,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:09:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:09:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:15,767 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:09:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:15,845 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-16 12:09:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:09:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-16 12:09:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:15,847 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:09:15,847 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 12:09:15,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:09:15,849 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:15,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:09:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 12:09:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-16 12:09:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:09:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-16 12:09:15,860 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-11-16 12:09:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:15,861 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-16 12:09:15,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:09:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-16 12:09:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:09:15,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:15,862 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:09:15,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2022-11-16 12:09:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955242061] [2022-11-16 12:09:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:15,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:15,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433376723] [2022-11-16 12:09:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:15,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:15,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:09:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:09:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:09:16,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:09:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955242061] [2022-11-16 12:09:16,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433376723] [2022-11-16 12:09:16,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433376723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:16,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:16,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-16 12:09:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310492861] [2022-11-16 12:09:16,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:09:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:09:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:09:16,511 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:09:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:17,740 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-11-16 12:09:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:09:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-16 12:09:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:17,744 INFO L225 Difference]: With dead ends: 65 [2022-11-16 12:09:17,744 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 12:09:17,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:09:17,747 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 60 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:09:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 12:09:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-16 12:09:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 33 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:09:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-16 12:09:17,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 19 [2022-11-16 12:09:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:17,766 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-16 12:09:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:09:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-16 12:09:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:09:17,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:17,768 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:17,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:09:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:17,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2022-11-16 12:09:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960500771] [2022-11-16 12:09:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:17,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:17,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:17,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743680815] [2022-11-16 12:09:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:17,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:17,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:17,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:18,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:09:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:18,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960500771] [2022-11-16 12:09:18,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743680815] [2022-11-16 12:09:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743680815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:18,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:18,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-16 12:09:18,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434964772] [2022-11-16 12:09:18,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:18,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:09:18,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:09:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:09:18,365 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:09:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:18,627 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-11-16 12:09:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:09:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2022-11-16 12:09:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:18,630 INFO L225 Difference]: With dead ends: 66 [2022-11-16 12:09:18,630 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 12:09:18,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:09:18,632 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:18,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 80 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 12:09:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-16 12:09:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:09:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-11-16 12:09:18,649 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 26 [2022-11-16 12:09:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:18,650 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-11-16 12:09:18,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:09:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-11-16 12:09:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 12:09:18,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:18,652 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:18,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:09:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:18,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2022-11-16 12:09:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695423457] [2022-11-16 12:09:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:18,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:18,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839212716] [2022-11-16 12:09:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:18,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:18,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:18,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:09:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:09:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 12:09:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 12:09:20,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695423457] [2022-11-16 12:09:20,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839212716] [2022-11-16 12:09:20,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839212716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:20,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:20,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-16 12:09:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504364083] [2022-11-16 12:09:20,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:20,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:09:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:09:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:09:21,000 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-16 12:09:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:24,954 INFO L93 Difference]: Finished difference Result 142 states and 193 transitions. [2022-11-16 12:09:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:09:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2022-11-16 12:09:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:24,957 INFO L225 Difference]: With dead ends: 142 [2022-11-16 12:09:24,957 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 12:09:24,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:09:24,959 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:24,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 94 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:09:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 12:09:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-11-16 12:09:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.203125) internal successors, (77), 71 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 12:09:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2022-11-16 12:09:25,007 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 56 [2022-11-16 12:09:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:25,008 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2022-11-16 12:09:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-16 12:09:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2022-11-16 12:09:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:09:25,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:25,011 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:25,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:25,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:25,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2022-11-16 12:09:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289517943] [2022-11-16 12:09:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:25,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991319239] [2022-11-16 12:09:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:25,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:25,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:09:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:09:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 12:09:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 12:09:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289517943] [2022-11-16 12:09:26,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:26,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991319239] [2022-11-16 12:09:26,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991319239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:26,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:26,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-16 12:09:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158789992] [2022-11-16 12:09:26,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:09:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:09:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:26,388 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:09:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:28,169 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2022-11-16 12:09:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:09:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 67 [2022-11-16 12:09:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:28,172 INFO L225 Difference]: With dead ends: 161 [2022-11-16 12:09:28,172 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 12:09:28,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:09:28,174 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:28,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 87 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:09:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 12:09:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2022-11-16 12:09:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 66 states have internal predecessors, (72), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-16 12:09:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2022-11-16 12:09:28,241 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 67 [2022-11-16 12:09:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:28,242 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2022-11-16 12:09:28,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:09:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2022-11-16 12:09:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:09:28,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:28,244 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2022-11-16 12:09:28,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:28,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:28,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2022-11-16 12:09:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:28,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107305123] [2022-11-16 12:09:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:28,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:28,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:28,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498603072] [2022-11-16 12:09:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:28,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:28,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:28,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:09:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:09:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:09:28,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:09:29,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107305123] [2022-11-16 12:09:29,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498603072] [2022-11-16 12:09:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498603072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:29,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:29,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-16 12:09:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633510767] [2022-11-16 12:09:29,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:09:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:09:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:29,353 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-16 12:09:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:29,938 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2022-11-16 12:09:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:09:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 72 [2022-11-16 12:09:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:29,940 INFO L225 Difference]: With dead ends: 117 [2022-11-16 12:09:29,940 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:09:29,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:09:29,942 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:29,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 92 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:09:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:09:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-16 12:09:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 57 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 12:09:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-11-16 12:09:29,970 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 72 [2022-11-16 12:09:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:29,971 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-11-16 12:09:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-16 12:09:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-11-16 12:09:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 12:09:29,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:29,973 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:29,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:30,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:30,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2022-11-16 12:09:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761658824] [2022-11-16 12:09:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:30,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:30,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21517355] [2022-11-16 12:09:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:30,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:30,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:30,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:30,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:09:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:09:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-16 12:09:30,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761658824] [2022-11-16 12:09:30,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21517355] [2022-11-16 12:09:30,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21517355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:30,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:30,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:09:30,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26098892] [2022-11-16 12:09:30,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:30,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:09:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:30,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:09:30,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:09:30,536 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-16 12:09:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:30,822 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-11-16 12:09:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:09:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-11-16 12:09:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:30,824 INFO L225 Difference]: With dead ends: 116 [2022-11-16 12:09:30,824 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:09:30,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:09:30,826 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:30,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:09:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-11-16 12:09:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 12:09:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-11-16 12:09:30,859 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 86 [2022-11-16 12:09:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:30,859 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-11-16 12:09:30,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-16 12:09:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-11-16 12:09:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 12:09:30,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:30,861 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:30,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:31,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:31,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2022-11-16 12:09:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616375473] [2022-11-16 12:09:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:31,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:09:31,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680018128] [2022-11-16 12:09:31,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:31,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:31,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:31,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:09:31,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:09:31,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:31,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:09:31,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 12:09:31,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 12:10:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616375473] [2022-11-16 12:10:09,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:10:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680018128] [2022-11-16 12:10:09,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680018128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:09,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:09,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-16 12:10:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282555046] [2022-11-16 12:10:09,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:10:09,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:10:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=337, Unknown=1, NotChecked=0, Total=420 [2022-11-16 12:10:09,773 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-16 12:10:30,458 WARN L233 SmtUtils]: Spent 19.49s on a formula simplification. DAG size of input: 166 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:33,146 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 [] [2022-11-16 12:10:39,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:41,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:42,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:46,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:50,302 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 [] [2022-11-16 12:10:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:50,577 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-11-16 12:10:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:10:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 86 [2022-11-16 12:10:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:50,579 INFO L225 Difference]: With dead ends: 154 [2022-11-16 12:10:50,579 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 12:10:50,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=151, Invalid=550, Unknown=1, NotChecked=0, Total=702 [2022-11-16 12:10:50,581 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 108 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 169 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:50,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 168 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 770 Invalid, 4 Unknown, 0 Unchecked, 17.7s Time] [2022-11-16 12:10:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 12:10:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-16 12:10:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.1375) internal successors, (91), 86 states have internal predecessors, (91), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-16 12:10:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 160 transitions. [2022-11-16 12:10:50,641 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 160 transitions. Word has length 86 [2022-11-16 12:10:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:50,642 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 160 transitions. [2022-11-16 12:10:50,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-16 12:10:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 160 transitions. [2022-11-16 12:10:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 12:10:50,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:50,644 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:50,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:50,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:10:50,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:50,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1474759586, now seen corresponding path program 2 times [2022-11-16 12:10:50,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:50,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773911678] [2022-11-16 12:10:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:50,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:10:50,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739671989] [2022-11-16 12:10:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:50,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:10:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:10:50,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:10:50,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:10:50,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:10:50,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 12:10:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-16 12:10:51,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-16 12:11:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773911678] [2022-11-16 12:11:03,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:11:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739671989] [2022-11-16 12:11:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739671989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:03,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:03,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-16 12:11:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160235841] [2022-11-16 12:11:03,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:03,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:11:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:11:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:11:03,012 INFO L87 Difference]: Start difference. First operand 129 states and 160 transitions. Second operand has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-16 12:11:09,224 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 [] [2022-11-16 12:11:17,126 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 [] [2022-11-16 12:11:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:23,133 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2022-11-16 12:11:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:11:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2022-11-16 12:11:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:23,135 INFO L225 Difference]: With dead ends: 184 [2022-11-16 12:11:23,135 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 12:11:23,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:11:23,137 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:23,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 145 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 732 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-11-16 12:11:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 12:11:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2022-11-16 12:11:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 68 states have internal predecessors, (70), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 12:11:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-11-16 12:11:23,207 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 97 [2022-11-16 12:11:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:23,208 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-11-16 12:11:23,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-16 12:11:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-11-16 12:11:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 12:11:23,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:23,210 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:23,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:11:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:11:23,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 2 times [2022-11-16 12:11:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:23,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441653488] [2022-11-16 12:11:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:23,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:11:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398398365] [2022-11-16 12:11:23,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:23,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:23,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:23,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:23,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:11:23,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:11:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:11:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-16 12:11:24,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-16 12:12:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441653488] [2022-11-16 12:12:30,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:12:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398398365] [2022-11-16 12:12:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398398365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:30,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2022-11-16 12:12:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008172836] [2022-11-16 12:12:30,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:12:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:12:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:12:30,914 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-16 12:13:30,801 WARN L233 SmtUtils]: Spent 57.79s on a formula simplification. DAG size of input: 221 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:13:33,927 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 [] [2022-11-16 12:13:44,007 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 113 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:14:04,835 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse48 (div |c_ULTIMATE.start_main_~p~0#1| 2))) (let ((.cse41 (+ .cse48 1))) (let ((.cse11 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse46 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse6 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse23 (* .cse48 |c_ULTIMATE.start_main_~B~0#1|)) (.cse18 (div |c_ULTIMATE.start_main_~d~0#1| 4)) (.cse1 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse8 (= (mod .cse41 2) 0)) (.cse47 (< .cse48 0)) (.cse14 (= (mod .cse48 2) 0))) (let ((.cse13 (and .cse47 (not .cse14))) (.cse15 (not .cse47)) (.cse16 (div |c_ULTIMATE.start_main_~p~0#1| 4)) (.cse2 (* 2 |c_ULTIMATE.start_main_~d~0#1|)) (.cse9 (not .cse8)) (.cse22 (+ .cse1 (div |c_ULTIMATE.start_main_~d~0#1| 8) |c_ULTIMATE.start_main_~A~0#1|)) (.cse21 (< (+ (* |c_ULTIMATE.start_main_~r~0#1| 4) 3) (* .cse1 5))) (.cse25 (< (+ .cse1 .cse18) (+ |c_ULTIMATE.start_main_~r~0#1| 1))) (.cse10 (div .cse41 2)) (.cse32 (* 5 |c_ULTIMATE.start_main_~d~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|)) (.cse0 (+ (* 2 |c_ULTIMATE.start_main_~r~0#1|) 1)) (.cse37 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse33 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse35 (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse23)) (.cse3 (not .cse46)) (.cse17 (and (not .cse11) .cse46)) (.cse36 (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse23))) (and (or (< .cse0 (+ .cse1 .cse2)) (<= (+ .cse1 |c_ULTIMATE.start_main_~d~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (let ((.cse4 (+ .cse18 |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (and (or .cse3 (let ((.cse7 (* .cse10 |c_ULTIMATE.start_main_~B~0#1|))) (and (or (= .cse4 (+ .cse5 .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse7)) .cse8) (or (= .cse4 (+ .cse5 .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse7)) .cse9))) .cse11) (or (let ((.cse12 (* .cse16 |c_ULTIMATE.start_main_~B~0#1|))) (and (or (= .cse4 (+ .cse5 .cse12 .cse6 |c_ULTIMATE.start_main_~r~0#1|)) .cse13) (or .cse14 (= .cse4 (+ .cse5 .cse12 .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1|)) .cse15))) .cse17)))) (or (and (or .cse13 (let ((.cse20 (< .cse16 0)) (.cse24 (* (div |c_ULTIMATE.start_main_~p~0#1| 8) |c_ULTIMATE.start_main_~B~0#1|)) (.cse19 (= (mod .cse16 2) 0))) (and (or (and (not .cse19) .cse20) .cse21 (= .cse22 (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse23 .cse24)) .cse25) (or (not .cse20) .cse21 (= (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse23 .cse24) .cse22) .cse25 .cse19)))) (or .cse14 .cse15 (let ((.cse28 (+ .cse16 1))) (let ((.cse26 (= (mod .cse28 2) 0)) (.cse27 (* |c_ULTIMATE.start_main_~B~0#1| (div .cse28 2)))) (and (or (not .cse26) .cse21 .cse25 (= .cse22 (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse23 .cse27))) (or .cse26 .cse21 .cse25 (= (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse23 .cse27) .cse22))))))) .cse17) (or (let ((.cse31 (+ .cse2 |c_ULTIMATE.start_main_~A~0#1| (div .cse2 4))) (.cse29 (* .cse5 2)) (.cse30 (* |c_ULTIMATE.start_main_~B~0#1| (div (* |c_ULTIMATE.start_main_~p~0#1| 2) 4)))) (and (or (= (+ .cse29 .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse30) .cse31) .cse17) (or .cse3 (= .cse31 (+ .cse29 .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse30)) .cse11))) (< .cse0 .cse32) (<= (* 3 |c_ULTIMATE.start_main_~d~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) (or (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|) (+ .cse5 .cse6 |c_ULTIMATE.start_main_~r~0#1|)) (not (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (not (<= (+ .cse1 1) |c_ULTIMATE.start_main_~r~0#1|)) .cse33 (let ((.cse34 (+ .cse1 |c_ULTIMATE.start_main_~A~0#1| 1))) (and (or .cse3 (= .cse34 .cse35) .cse11) (or (= .cse34 .cse36) .cse17))) (not .cse37)) (or (let ((.cse38 (* 2 |c_ULTIMATE.start_main_~B~0#1|))) (and (or .cse9 (let ((.cse39 (* (div .cse41 4) |c_ULTIMATE.start_main_~B~0#1|)) (.cse40 (= (mod .cse10 2) 0))) (and (or (= (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse38 .cse23 .cse39) .cse22) .cse21 .cse25 .cse40) (or (= (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse23 .cse39) .cse22) .cse21 .cse25 (not .cse40))))) (or (let ((.cse44 (+ .cse10 1))) (let ((.cse43 (* (div .cse44 2) |c_ULTIMATE.start_main_~B~0#1|)) (.cse42 (= (mod .cse44 2) 0))) (and (or .cse42 (= (+ .cse43 .cse6 |c_ULTIMATE.start_main_~r~0#1| .cse38 .cse23) .cse22) .cse21 .cse25) (or (= (+ .cse43 .cse6 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse23) .cse22) (not .cse42) .cse21 .cse25)))) .cse8))) .cse3 .cse11) (or (= (+ .cse32 |c_ULTIMATE.start_main_~A~0#1|) (+ .cse6 |c_ULTIMATE.start_main_~r~0#1| (* .cse5 5))) (< .cse0 (* |c_ULTIMATE.start_main_~d~0#1| 10)) (<= (* |c_ULTIMATE.start_main_~d~0#1| 6) |c_ULTIMATE.start_main_~r~0#1|)) (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse6 |c_ULTIMATE.start_main_~r~0#1|)) (or (not (<= .cse1 |c_ULTIMATE.start_main_~r~0#1|)) (and .cse37 (not .cse33)) (let ((.cse45 (+ .cse1 |c_ULTIMATE.start_main_~A~0#1|))) (and (or (= .cse45 .cse35) .cse3 .cse11) (or .cse17 (= .cse45 .cse36)))))))))) is different from false [2022-11-16 12:14:14,517 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 101 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:14:16,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:14:20,111 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 [] [2022-11-16 12:14:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:20,845 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-11-16 12:14:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:14:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 116 [2022-11-16 12:14:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:20,848 INFO L225 Difference]: With dead ends: 208 [2022-11-16 12:14:20,848 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 12:14:20,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 99.2s TimeCoverageRelationStatistics Valid=370, Invalid=1193, Unknown=1, NotChecked=76, Total=1640 [2022-11-16 12:14:20,849 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 355 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:20,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 195 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1017 Invalid, 2 Unknown, 1 Unchecked, 18.3s Time] [2022-11-16 12:14:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 12:14:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2022-11-16 12:14:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 111 states have (on average 1.135135135135135) internal successors, (126), 115 states have internal predecessors, (126), 45 states have call successors, (45), 19 states have call predecessors, (45), 19 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-16 12:14:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 215 transitions. [2022-11-16 12:14:20,989 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 215 transitions. Word has length 116 [2022-11-16 12:14:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:20,990 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 215 transitions. [2022-11-16 12:14:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-16 12:14:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 215 transitions. [2022-11-16 12:14:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 12:14:20,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:20,992 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:20,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:14:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:14:21,198 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1316179534, now seen corresponding path program 3 times [2022-11-16 12:14:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874143883] [2022-11-16 12:14:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:21,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:21,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:14:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861353326] [2022-11-16 12:14:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:21,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:21,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:21,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:14:21,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:14:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:14:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 118 proven. 52 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-16 12:14:21,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:24,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874143883] [2022-11-16 12:14:24,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:14:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861353326] [2022-11-16 12:14:24,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861353326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:24,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:24,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-16 12:14:24,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266471219] [2022-11-16 12:14:24,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:14:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:14:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:14:24,761 INFO L87 Difference]: Start difference. First operand 176 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:14:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:25,063 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2022-11-16 12:14:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:14:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-16 12:14:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:25,065 INFO L225 Difference]: With dead ends: 194 [2022-11-16 12:14:25,066 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 12:14:25,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:14:25,067 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:25,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 12:14:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-16 12:14:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 127 states have internal predecessors, (138), 45 states have call successors, (45), 23 states have call predecessors, (45), 23 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-16 12:14:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-11-16 12:14:25,186 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 121 [2022-11-16 12:14:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:25,186 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-11-16 12:14:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:14:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-11-16 12:14:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 12:14:25,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:25,189 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:25,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:14:25,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1262824565, now seen corresponding path program 1 times [2022-11-16 12:14:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:25,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162703051] [2022-11-16 12:14:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:25,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:14:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150371568] [2022-11-16 12:14:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:25,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:25,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:25,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:14:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:14:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 95 proven. 110 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-11-16 12:14:26,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 95 proven. 110 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-11-16 12:14:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162703051] [2022-11-16 12:14:34,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:14:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150371568] [2022-11-16 12:14:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150371568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:34,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:14:34,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2022-11-16 12:14:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265843923] [2022-11-16 12:14:34,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:14:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:14:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:14:34,314 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 17 states have call predecessors, (40), 15 states have call successors, (40) [2022-11-16 12:14:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:52,714 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2022-11-16 12:14:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:14:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 17 states have call predecessors, (40), 15 states have call successors, (40) Word has length 127 [2022-11-16 12:14:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:52,716 INFO L225 Difference]: With dead ends: 269 [2022-11-16 12:14:52,716 INFO L226 Difference]: Without dead ends: 194 [2022-11-16 12:14:52,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:14:52,718 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 210 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-16 12:14:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-16 12:14:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-11-16 12:14:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 119 states have internal predecessors, (123), 37 states have call successors, (37), 24 states have call predecessors, (37), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 12:14:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2022-11-16 12:14:52,836 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 127 [2022-11-16 12:14:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:52,836 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2022-11-16 12:14:52,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 17 states have call predecessors, (40), 15 states have call successors, (40) [2022-11-16 12:14:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2022-11-16 12:14:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 12:14:52,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:52,838 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:52,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:53,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:14:53,039 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1395307885, now seen corresponding path program 3 times [2022-11-16 12:14:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774465634] [2022-11-16 12:14:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:53,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:14:53,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173005251] [2022-11-16 12:14:53,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:53,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:53,055 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:53,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:14:53,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:14:53,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:14:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-16 12:14:53,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774465634] [2022-11-16 12:15:00,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:15:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173005251] [2022-11-16 12:15:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173005251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:15:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-16 12:15:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373733407] [2022-11-16 12:15:00,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:15:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:15:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:15:00,753 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:15:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:01,012 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2022-11-16 12:15:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:15:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 12:15:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:01,014 INFO L225 Difference]: With dead ends: 177 [2022-11-16 12:15:01,014 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 12:15:01,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:15:01,015 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:01,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 12:15:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 12:15:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 12:15:01,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2022-11-16 12:15:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:01,017 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:15:01,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:15:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:15:01,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 12:15:01,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 12:15:01,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:01,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:01,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 12:15:13,648 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 516 DAG size of output: 14 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 12:15:21,686 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 516 DAG size of output: 14 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 12:15:37,663 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 502 DAG size of output: 14 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 12:15:43,229 INFO L902 garLoopResultBuilder]: At program point L60(lines 22 61) the Hoare annotation is: true [2022-11-16 12:15:43,230 INFO L899 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2022-11-16 12:15:43,230 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-16 12:15:43,230 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2022-11-16 12:15:43,230 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|))) (and (= (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~d~0#1|) (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) .cse0 |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= .cse0 |ULTIMATE.start_main_~d~0#1|))) [2022-11-16 12:15:43,231 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|))) (let ((.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= .cse3 |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse0) .cse1 .cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1| (* .cse3 3)) (+ |ULTIMATE.start_main_~A~0#1| (* 3 |ULTIMATE.start_main_~d~0#1|))) .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse0 |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse5 .cse1 .cse2 .cse4) (and .cse5 .cse1 .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|))))) [2022-11-16 12:15:43,231 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-16 12:15:43,231 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 12:15:43,231 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-16 12:15:43,232 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-16 12:15:43,232 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-11-16 12:15:43,232 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-16 12:15:43,232 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-11-16 12:15:43,232 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 12:15:43,233 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|))) (or (and .cse0 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)))) [2022-11-16 12:15:43,233 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-11-16 12:15:43,233 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|))) (let ((.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= .cse3 |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse0) .cse1 .cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1| (* .cse3 3)) (+ |ULTIMATE.start_main_~A~0#1| (* 3 |ULTIMATE.start_main_~d~0#1|))) .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse0 |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse5 .cse1 .cse2 .cse4) (and .cse5 .cse1 .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|))))) [2022-11-16 12:15:43,233 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2022-11-16 12:15:43,234 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|))) (let ((.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= .cse3 |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse0) .cse1 .cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1| (* .cse3 3)) (+ |ULTIMATE.start_main_~A~0#1| (* 3 |ULTIMATE.start_main_~d~0#1|))) .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse0 |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse5 .cse1 .cse2 .cse4) (and .cse5 .cse1 .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|))))) [2022-11-16 12:15:43,234 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|))) (let ((.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= .cse3 |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse0) .cse1 .cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1| (* .cse3 3)) (+ |ULTIMATE.start_main_~A~0#1| (* 3 |ULTIMATE.start_main_~d~0#1|))) .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse0 |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse5 .cse1 .cse2 .cse4) (and .cse5 .cse1 .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|))))) [2022-11-16 12:15:43,234 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-16 12:15:43,234 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-16 12:15:43,235 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-16 12:15:43,235 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-16 12:15:43,235 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-16 12:15:43,235 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-16 12:15:43,245 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:43,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 12:15:43,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:15:43 BoogieIcfgContainer [2022-11-16 12:15:43,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 12:15:43,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:15:43,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:15:43,277 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:15:43,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:09:14" (3/4) ... [2022-11-16 12:15:43,281 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 12:15:43,290 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-16 12:15:43,296 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-16 12:15:43,296 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-16 12:15:43,297 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-16 12:15:43,297 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 12:15:43,297 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 12:15:43,337 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 12:15:43,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:15:43,338 INFO L158 Benchmark]: Toolchain (without parser) took 389383.51ms. Allocated memory was 92.3MB in the beginning and 285.2MB in the end (delta: 192.9MB). Free memory was 54.2MB in the beginning and 245.5MB in the end (delta: -191.4MB). Peak memory consumption was 1.5MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,338 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory was 70.5MB in the beginning and 70.5MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:15:43,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.32ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 53.9MB in the beginning and 89.1MB in the end (delta: -35.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,340 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.02ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,341 INFO L158 Benchmark]: Boogie Preprocessor took 24.08ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 86.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,341 INFO L158 Benchmark]: RCFGBuilder took 457.98ms. Allocated memory is still 113.2MB. Free memory was 86.2MB in the beginning and 75.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,341 INFO L158 Benchmark]: TraceAbstraction took 388456.99ms. Allocated memory was 113.2MB in the beginning and 285.2MB in the end (delta: 172.0MB). Free memory was 74.6MB in the beginning and 247.6MB in the end (delta: -173.0MB). Peak memory consumption was 161.7MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,343 INFO L158 Benchmark]: Witness Printer took 60.44ms. Allocated memory is still 285.2MB. Free memory was 247.6MB in the beginning and 245.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:15:43,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory was 70.5MB in the beginning and 70.5MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.32ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 53.9MB in the beginning and 89.1MB in the end (delta: -35.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.02ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.08ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 86.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 457.98ms. Allocated memory is still 113.2MB. Free memory was 86.2MB in the beginning and 75.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 388456.99ms. Allocated memory was 113.2MB in the beginning and 285.2MB in the end (delta: 172.0MB). Free memory was 74.6MB in the beginning and 247.6MB in the end (delta: -173.0MB). Peak memory consumption was 161.7MB. Max. memory is 16.1GB. * Witness Printer took 60.44ms. Allocated memory is still 285.2MB. Free memory was 247.6MB in the beginning and 245.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 388.3s, OverallIterations: 15, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 198.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 42.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 751 SdHoareTripleChecker+Valid, 55.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 1540 SdHoareTripleChecker+Invalid, 54.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1 IncrementalHoareTripleChecker+Unchecked, 1128 mSDsCounter, 1257 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5305 IncrementalHoareTripleChecker+Invalid, 6571 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1257 mSolverCounterUnsat, 412 mSDtfsCounter, 5305 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1751 GetRequests, 1486 SyntacticMatches, 10 SemanticMatches, 255 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 169.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=13, InterpolantAutomatonStates: 181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 15 MinimizatonAttempts, 92 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 157 PreInvPairs, 256 NumberOfFragments, 421 HoareAnnotationTreeSize, 157 FomulaSimplifications, 11716 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 127128 FormulaSimplificationTreeSizeReductionInter, 39.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 143.1s InterpolantComputationTime, 1034 NumberOfCodeBlocks, 899 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1676 ConstructedInterpolants, 0 QuantifiedInterpolants, 33309 SizeOfPredicates, 48 NumberOfNonLiveVariables, 2303 ConjunctsInSsa, 406 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 7112/8042 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (A == B * q + r && B * p == d) && B == 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((2 <= d / 2 && B * p == d) && A == r) && B * q + r + B * p * 3 == A + 3 * d) && B == 1) && d % 2 == 0) && d / 2 <= r) || ((((B == d && q == 0) && B * p == d) && A == r) && B == 1)) || ((((q == 0 && B * p == d) && A == r) && B == 1) && 2 == d) RESULT: Ultimate proved your program to be correct! [2022-11-16 12:15:43,585 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-16 12:15:43,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_285d1a47-050e-4691-b2be-07917640600b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE