./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:18:17,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:18:17,792 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:18:17,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:18:17,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:18:17,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:18:17,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:18:17,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:18:17,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:18:17,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:18:17,826 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:18:17,826 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:18:17,827 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:18:17,827 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:18:17,828 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:18:17,828 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:18:17,829 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:18:17,829 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:18:17,830 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:18:17,830 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:18:17,831 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:18:17,834 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:18:17,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:18:17,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:18:17,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:18:17,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:18:17,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:18:17,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:18:17,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:18:17,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:18:17,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:18:17,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:18:17,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:18:17,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:18:17,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:18:17,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:18:17,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:18:17,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:18:17,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:18:17,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:18:17,840 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:18:17,840 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:18:17,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:18:17,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:18:17,841 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:18:17,841 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:18:17,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:18:17,842 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 [2023-12-02 19:18:18,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:18:18,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:18:18,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:18:18,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:18:18,086 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:18:18,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2023-12-02 19:18:20,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:18:21,010 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:18:21,011 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2023-12-02 19:18:21,017 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/data/825566990/e3e3708bd35a47078d826986dc9d2cd5/FLAG3f67e0b64 [2023-12-02 19:18:21,029 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/data/825566990/e3e3708bd35a47078d826986dc9d2cd5 [2023-12-02 19:18:21,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:18:21,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:18:21,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:18:21,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:18:21,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:18:21,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb05b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21, skipping insertion in model container [2023-12-02 19:18:21,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:18:21,198 WARN L240 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_90774c69-e56d-4276-bea4-b67f0ff098d7/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2023-12-02 19:18:21,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:18:21,219 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:18:21,229 WARN L240 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_90774c69-e56d-4276-bea4-b67f0ff098d7/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2023-12-02 19:18:21,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:18:21,247 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:18:21,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21 WrapperNode [2023-12-02 19:18:21,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:18:21,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:18:21,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:18:21,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:18:21,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,274 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2023-12-02 19:18:21,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:18:21,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:18:21,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:18:21,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:18:21,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:18:21,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:18:21,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:18:21,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:18:21,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (1/1) ... [2023-12-02 19:18:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:18:21,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:21,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:18:21,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:18:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:18:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:18:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:18:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:18:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:18:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:18:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 19:18:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 19:18:21,427 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:18:21,429 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:18:21,536 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:18:21,578 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:18:21,578 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:18:21,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:21 BoogieIcfgContainer [2023-12-02 19:18:21,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:18:21,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:18:21,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:18:21,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:18:21,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:18:21" (1/3) ... [2023-12-02 19:18:21,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac07730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:21, skipping insertion in model container [2023-12-02 19:18:21,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:21" (2/3) ... [2023-12-02 19:18:21,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac07730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:21, skipping insertion in model container [2023-12-02 19:18:21,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:21" (3/3) ... [2023-12-02 19:18:21,589 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2023-12-02 19:18:21,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:18:21,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:18:21,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:18:21,668 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@73e20990, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:18:21,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:18:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:18:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 19:18:21,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:21,681 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:21,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:18:21,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash -419629030, now seen corresponding path program 1 times [2023-12-02 19:18:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489676305] [2023-12-02 19:18:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:21,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:18:21,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445369986] [2023-12-02 19:18:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:21,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:21,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:21,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:21,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:18:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:21,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:18:21,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:18:22,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:18:22,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489676305] [2023-12-02 19:18:22,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:18:22,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445369986] [2023-12-02 19:18:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445369986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:18:22,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:18:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:18:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445476156] [2023-12-02 19:18:22,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:18:22,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:18:22,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:18:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:18:22,057 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 19:18:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:22,130 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2023-12-02 19:18:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:18:22,132 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-12-02 19:18:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:22,139 INFO L225 Difference]: With dead ends: 41 [2023-12-02 19:18:22,139 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 19:18:22,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:18:22,145 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:22,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:18:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 19:18:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-12-02 19:18:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:18:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-02 19:18:22,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-12-02 19:18:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:22,177 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-02 19:18:22,177 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 19:18:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-02 19:18:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 19:18:22,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:22,179 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:22,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:18:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 19:18:22,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:18:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1592245763, now seen corresponding path program 1 times [2023-12-02 19:18:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511870400] [2023-12-02 19:18:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:22,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:18:22,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796104507] [2023-12-02 19:18:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:22,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:22,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:22,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:22,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:18:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:22,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:18:22,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:18:22,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:18:22,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511870400] [2023-12-02 19:18:22,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:18:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796104507] [2023-12-02 19:18:22,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796104507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:18:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:18:22,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:18:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513316437] [2023-12-02 19:18:22,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:18:22,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:18:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:22,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:18:22,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:18:22,499 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:18:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:22,544 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-12-02 19:18:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:18:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-12-02 19:18:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:22,546 INFO L225 Difference]: With dead ends: 32 [2023-12-02 19:18:22,546 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 19:18:22,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:18:22,548 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:22,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:18:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 19:18:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 19:18:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:18:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-12-02 19:18:22,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2023-12-02 19:18:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:22,556 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-12-02 19:18:22,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:18:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-12-02 19:18:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:18:22,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:22,557 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:22,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:18:22,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:22,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:18:22,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash -556494917, now seen corresponding path program 1 times [2023-12-02 19:18:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998200919] [2023-12-02 19:18:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:22,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:18:22,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945938615] [2023-12-02 19:18:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:22,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:22,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:22,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:22,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:18:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:22,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 19:18:22,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:18:24,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:29,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998200919] [2023-12-02 19:18:29,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:18:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945938615] [2023-12-02 19:18:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945938615] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657380776] [2023-12-02 19:18:29,713 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 19:18:29,713 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:29,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:29,721 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:29,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:30,852 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 19:18:30,880 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 19:18:30,882 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:18:37,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:18:37,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:18:37,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:18:37,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 19:18:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505377434] [2023-12-02 19:18:37,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 19:18:37,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 19:18:37,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 19:18:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=742, Unknown=1, NotChecked=0, Total=870 [2023-12-02 19:18:37,227 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:18:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:37,669 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-12-02 19:18:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:18:37,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-12-02 19:18:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:37,671 INFO L225 Difference]: With dead ends: 35 [2023-12-02 19:18:37,671 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 19:18:37,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=144, Invalid=847, Unknown=1, NotChecked=0, Total=992 [2023-12-02 19:18:37,673 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:37,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:18:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 19:18:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-12-02 19:18:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 19:18:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-12-02 19:18:37,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2023-12-02 19:18:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:37,682 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-12-02 19:18:37,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:18:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-12-02 19:18:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:18:37,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:37,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:37,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:18:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 19:18:37,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:18:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 762174686, now seen corresponding path program 1 times [2023-12-02 19:18:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885425747] [2023-12-02 19:18:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:37,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:18:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154241088] [2023-12-02 19:18:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:37,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:37,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:37,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:18:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:37,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 19:18:37,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:18:38,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:18:38,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885425747] [2023-12-02 19:18:38,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:18:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154241088] [2023-12-02 19:18:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154241088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:18:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830611529] [2023-12-02 19:18:38,089 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 19:18:38,089 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:38,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:38,090 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:38,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:38,735 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-12-02 19:18:38,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 19:18:38,744 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:18:41,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:18:41,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:18:41,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:18:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-12-02 19:18:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849056338] [2023-12-02 19:18:41,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:18:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 19:18:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 19:18:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-12-02 19:18:41,804 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 19:18:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:41,937 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-12-02 19:18:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:18:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2023-12-02 19:18:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:41,940 INFO L225 Difference]: With dead ends: 37 [2023-12-02 19:18:41,940 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 19:18:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:18:41,941 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:41,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:18:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 19:18:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-02 19:18:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 19:18:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-12-02 19:18:41,947 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 30 [2023-12-02 19:18:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:41,948 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-12-02 19:18:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 19:18:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-12-02 19:18:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 19:18:41,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:41,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:41,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:18:42,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:42,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:18:42,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash -583905030, now seen corresponding path program 2 times [2023-12-02 19:18:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065416032] [2023-12-02 19:18:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:42,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:42,161 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:18:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958330851] [2023-12-02 19:18:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:18:42,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:42,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:42,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:18:42,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:18:42,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:18:42,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 19:18:42,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 19:18:45,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:53,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065416032] [2023-12-02 19:18:53,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:18:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958330851] [2023-12-02 19:18:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958330851] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604199481] [2023-12-02 19:18:53,046 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 19:18:53,046 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:53,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:53,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:53,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:53,678 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 19:18:53,696 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 19:18:53,698 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:18:59,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1013#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:18:59,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:18:59,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:18:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 19:18:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831123848] [2023-12-02 19:18:59,551 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 19:18:59,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 19:18:59,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 19:18:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-12-02 19:18:59,552 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:19:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:19:00,441 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-12-02 19:19:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:19:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2023-12-02 19:19:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:19:00,442 INFO L225 Difference]: With dead ends: 40 [2023-12-02 19:19:00,442 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 19:19:00,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:19:00,444 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:19:00,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 19:19:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 19:19:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-12-02 19:19:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 19:19:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-12-02 19:19:00,455 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2023-12-02 19:19:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:19:00,455 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-12-02 19:19:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 19:19:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-12-02 19:19:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 19:19:00,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:19:00,457 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:19:00,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:19:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:19:00,658 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:19:00,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:19:00,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1082950949, now seen corresponding path program 3 times [2023-12-02 19:19:00,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:19:00,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400162559] [2023-12-02 19:19:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:19:00,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:19:00,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248353843] [2023-12-02 19:19:00,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:19:00,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:19:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:19:00,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:19:00,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:19:00,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:19:00,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:19:00,798 WARN L260 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 19:19:00,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:19:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:19:20,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:19:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:19:39,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:19:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400162559] [2023-12-02 19:19:39,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:19:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248353843] [2023-12-02 19:19:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248353843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:19:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512494915] [2023-12-02 19:19:39,695 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 19:19:39,695 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:19:39,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:19:39,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:19:39,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:19:40,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 19:19:40,361 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 19:19:40,362 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:19:45,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1384#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 19:19:45,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:19:45,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:19:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2023-12-02 19:19:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86334925] [2023-12-02 19:19:45,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 19:19:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 19:19:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:19:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 19:19:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1094, Unknown=1, NotChecked=0, Total=1260 [2023-12-02 19:19:45,979 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 19:19:49,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:51,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:53,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:19:54,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:20:08,631 WARN L293 SmtUtils]: Spent 13.58s on a formula simplification. DAG size of input: 133 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:20:10,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:20:17,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 19:20:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:41,436 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-12-02 19:20:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:20:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2023-12-02 19:20:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:41,437 INFO L225 Difference]: With dead ends: 58 [2023-12-02 19:20:41,438 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 19:20:41,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=249, Invalid=1555, Unknown=2, NotChecked=0, Total=1806 [2023-12-02 19:20:41,439 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:41,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 133 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 181 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2023-12-02 19:20:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 19:20:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-02 19:20:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 19:20:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-12-02 19:20:41,462 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 38 [2023-12-02 19:20:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:41,462 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-12-02 19:20:41,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 19:20:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-12-02 19:20:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 19:20:41,465 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:41,465 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:41,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:20:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:20:41,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:41,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1147393126, now seen corresponding path program 4 times [2023-12-02 19:20:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:41,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448039575] [2023-12-02 19:20:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:41,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:41,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 19:20:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103782931] [2023-12-02 19:20:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:20:41,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:41,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:41,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:20:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:41,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 19:20:41,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 124 proven. 18 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-02 19:20:42,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:20:59,642 WARN L293 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 279 DAG size of output: 240 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:21:57,785 WARN L293 SmtUtils]: Spent 29.12s on a formula simplification. DAG size of input: 488 DAG size of output: 352 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:23:08,119 WARN L293 SmtUtils]: Spent 13.63s on a formula simplification that was a NOOP. DAG size: 352 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:23:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-12-02 19:23:30,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:23:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448039575] [2023-12-02 19:23:30,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 19:23:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103782931] [2023-12-02 19:23:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103782931] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 19:23:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:23:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 20 [2023-12-02 19:23:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46455430] [2023-12-02 19:23:30,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:23:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 19:23:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:23:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 19:23:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=279, Unknown=1, NotChecked=0, Total=380 [2023-12-02 19:23:30,914 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 19:25:10,696 WARN L293 SmtUtils]: Spent 1.50m on a formula simplification that was a NOOP. DAG size: 696 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:25:13,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 19:26:10,078 WARN L293 SmtUtils]: Spent 50.74s on a formula simplification that was a NOOP. DAG size: 585 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:26:48,610 WARN L293 SmtUtils]: Spent 33.14s on a formula simplification that was a NOOP. DAG size: 501 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:27:11,714 WARN L293 SmtUtils]: Spent 21.25s on a formula simplification that was a NOOP. DAG size: 440 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:27:26,085 WARN L293 SmtUtils]: Spent 11.99s on a formula simplification that was a NOOP. DAG size: 398 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:27:39,080 WARN L293 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 373 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:27:48,532 WARN L293 SmtUtils]: Spent 9.02s on a formula simplification that was a NOOP. DAG size: 355 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:27:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:48,548 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-12-02 19:27:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 19:27:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 73 [2023-12-02 19:27:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:48,549 INFO L225 Difference]: With dead ends: 60 [2023-12-02 19:27:48,549 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 19:27:48,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 317.7s TimeCoverageRelationStatistics Valid=182, Invalid=519, Unknown=1, NotChecked=0, Total=702 [2023-12-02 19:27:48,550 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:48,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 118 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 19:27:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 19:27:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 19:27:48,552 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) [2023-12-02 19:27:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 19:27:48,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2023-12-02 19:27:48,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:48,552 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 19:27:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 19:27:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 19:27:48,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 19:27:48,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 19:27:48,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:27:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:27:48,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 19:27:57,196 WARN L293 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 367 DAG size of output: 27 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-02 19:28:42,786 WARN L293 SmtUtils]: Spent 45.58s on a formula simplification. DAG size of input: 965 DAG size of output: 198 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-02 19:29:26,196 WARN L293 SmtUtils]: Spent 43.40s on a formula simplification. DAG size of input: 965 DAG size of output: 198 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-02 19:29:26,223 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 19:29:26,223 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 50) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2023-12-02 19:29:26,223 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (let ((.cse2 (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 2))) (let ((.cse1 (div (+ (- 1) .cse2) 2))) (let ((.cse3 (div (+ (- 1) .cse1) 2))) (let ((.cse0 (div (+ (- 1) .cse3) 2))) (or (= .cse0 0) (= |ULTIMATE.start_main_~b~0#1| 0) (= (div (+ .cse0 (- 1)) 2) 0) (= .cse1 0) (= .cse2 0) (= .cse3 0)))))) (<= |ULTIMATE.start_main_~a~0#1| 50) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 50)) [2023-12-02 19:29:26,223 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2023-12-02 19:29:26,223 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-12-02 19:29:26,223 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-12-02 19:29:26,223 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 19:29:26,224 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (+ (- 1) |ULTIMATE.start_main_~b~0#1|))) (let ((.cse6 (div .cse0 2))) (let ((.cse17 (* (- 1) .cse6)) (.cse4 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1)) (.cse8 (div |ULTIMATE.start_main_~b~0#1| 2)) (.cse23 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse15 (= (* 3 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~z~0#1|)) (.cse10 (= |ULTIMATE.start_main_~z~0#1| .cse23)) (.cse12 (<= (+ 2 (* (div (+ (* (- 1) .cse8) (- 1)) 2) 2) .cse8) 0)) (.cse18 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse9 (not .cse4)) (.cse2 (<= (+ .cse6 (* (div (+ (- 1) .cse17) 2) 2) 2) 0)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|)) (.cse1 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse14 (* |ULTIMATE.start_main_~a~0#1| 4)) (.cse19 (<= |ULTIMATE.start_main_~a~0#1| 50)) (.cse20 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse21 (<= |ULTIMATE.start_main_~b~0#1| 50)) (.cse22 (let ((.cse34 (div (+ (- 1) .cse6) 2))) (let ((.cse35 (div (+ (- 1) .cse34) 2))) (let ((.cse33 (div (+ (- 1) .cse35) 2))) (or (= .cse33 0) (= (div (+ .cse33 (- 1)) 2) 0) (= .cse34 0) (= .cse6 0) (= .cse35 0))))))) (or (and (let ((.cse5 (* |ULTIMATE.start_main_~y~0#1| 4))) (let ((.cse7 (+ .cse5 3)) (.cse13 (+ .cse5 2))) (or (and (<= (div .cse0 4) .cse1) .cse2 .cse3 .cse4 (<= .cse5 .cse6)) (and (= .cse7 .cse8) (= |ULTIMATE.start_main_~z~0#1| (* 6 |ULTIMATE.start_main_~a~0#1|)) .cse9) (let ((.cse11 (+ (- 1) .cse8))) (and .cse10 (= |ULTIMATE.start_main_~y~0#1| (div .cse11 4)) (not (= (mod (div .cse11 2) 2) 1)) (= (mod (+ 1 .cse8) 2) 0) .cse9)) (and (= |ULTIMATE.start_main_~z~0#1| (* 7 |ULTIMATE.start_main_~a~0#1|)) .cse4 (= .cse6 .cse7)) (and .cse12 (<= .cse8 .cse7) (<= .cse13 .cse8) (= |ULTIMATE.start_main_~z~0#1| .cse14) .cse9) (let ((.cse16 (div (+ .cse17 1) 2))) (and .cse15 (= (mod (+ .cse6 1) 2) 0) .cse4 (not (= (mod .cse16 2) 1)) (= (div (* (- 1) .cse16) 2) |ULTIMATE.start_main_~y~0#1|))) (and .cse12 (<= .cse5 .cse8) (<= (div |ULTIMATE.start_main_~b~0#1| 4) .cse1) .cse18 .cse9) (and (<= .cse6 .cse7) .cse2 (<= .cse13 .cse6) .cse4 (= (* 5 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~z~0#1|))))) (= (* |ULTIMATE.start_main_~a~0#1| 8) |ULTIMATE.start_main_~x~0#1|) .cse19 .cse20 .cse21 .cse22) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse19 .cse18 .cse20 .cse21 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse22) (and (or (and (= |ULTIMATE.start_main_~y~0#1| .cse8) .cse18 .cse9) (and (= .cse6 |ULTIMATE.start_main_~y~0#1|) .cse3 .cse4)) .cse19 (= |ULTIMATE.start_main_~x~0#1| .cse23) .cse20 .cse21 .cse22) (and (let ((.cse24 (+ .cse1 1))) (or (and .cse15 .cse4 (= .cse6 .cse24)) (and .cse10 (= .cse24 .cse8) .cse9) (and .cse12 (<= .cse8 .cse24) .cse18 (<= .cse1 .cse8) .cse9) (and (<= .cse6 .cse24) .cse2 .cse3 .cse4 (<= .cse1 .cse6)))) (= |ULTIMATE.start_main_~x~0#1| .cse14) .cse19 .cse20 .cse21 .cse22) (let ((.cse28 (div |ULTIMATE.start_main_~y~0#1| 4))) (and .cse19 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse20 .cse21 (or (and (let ((.cse30 (mod |ULTIMATE.start_main_~y~0#1| 2))) (or (let ((.cse25 (= .cse30 0)) (.cse27 (div |ULTIMATE.start_main_~y~0#1| 2))) (and (let ((.cse26 (+ 1 .cse27))) (or .cse25 (= .cse26 0) (and (not (= (mod .cse26 2) 0)) (= (+ (div .cse26 2) 1) 0)))) (let ((.cse29 (mod .cse27 2))) (or (and (= (+ .cse28 1) 0) (not (= .cse29 0))) (and (<= 0 .cse27) (= .cse29 1)) (not .cse25))))) (and (= .cse30 1) (<= 0 |ULTIMATE.start_main_~y~0#1|)))) (let ((.cse31 (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (or (< |ULTIMATE.start_main_~y~0#1| 0) (= .cse31 0) (and (= (mod .cse31 2) 1) (= (div (+ (- 1) .cse31) 2) 0))))) (= |ULTIMATE.start_main_~y~0#1| 0)) (let ((.cse32 (div |ULTIMATE.start_main_~y~0#1| 8))) (or (= (+ (* 2 |ULTIMATE.start_main_~x~0#1|) (* (* .cse32 |ULTIMATE.start_main_~x~0#1|) 2)) (* |ULTIMATE.start_main_~x~0#1| .cse28)) (= .cse28 (* .cse32 2)))) .cse22))))))) [2023-12-02 19:29:26,224 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= |ULTIMATE.start_main_~b~0#1| 50)) [2023-12-02 19:29:26,224 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (+ (- 1) |ULTIMATE.start_main_~b~0#1|))) (let ((.cse6 (div .cse0 2))) (let ((.cse17 (* (- 1) .cse6)) (.cse4 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1)) (.cse8 (div |ULTIMATE.start_main_~b~0#1| 2)) (.cse23 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse15 (= (* 3 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~z~0#1|)) (.cse10 (= |ULTIMATE.start_main_~z~0#1| .cse23)) (.cse12 (<= (+ 2 (* (div (+ (* (- 1) .cse8) (- 1)) 2) 2) .cse8) 0)) (.cse18 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse9 (not .cse4)) (.cse2 (<= (+ .cse6 (* (div (+ (- 1) .cse17) 2) 2) 2) 0)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|)) (.cse1 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse14 (* |ULTIMATE.start_main_~a~0#1| 4)) (.cse19 (<= |ULTIMATE.start_main_~a~0#1| 50)) (.cse20 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse21 (<= |ULTIMATE.start_main_~b~0#1| 50)) (.cse22 (let ((.cse34 (div (+ (- 1) .cse6) 2))) (let ((.cse35 (div (+ (- 1) .cse34) 2))) (let ((.cse33 (div (+ (- 1) .cse35) 2))) (or (= .cse33 0) (= (div (+ .cse33 (- 1)) 2) 0) (= .cse34 0) (= .cse6 0) (= .cse35 0))))))) (or (and (let ((.cse5 (* |ULTIMATE.start_main_~y~0#1| 4))) (let ((.cse7 (+ .cse5 3)) (.cse13 (+ .cse5 2))) (or (and (<= (div .cse0 4) .cse1) .cse2 .cse3 .cse4 (<= .cse5 .cse6)) (and (= .cse7 .cse8) (= |ULTIMATE.start_main_~z~0#1| (* 6 |ULTIMATE.start_main_~a~0#1|)) .cse9) (let ((.cse11 (+ (- 1) .cse8))) (and .cse10 (= |ULTIMATE.start_main_~y~0#1| (div .cse11 4)) (not (= (mod (div .cse11 2) 2) 1)) (= (mod (+ 1 .cse8) 2) 0) .cse9)) (and (= |ULTIMATE.start_main_~z~0#1| (* 7 |ULTIMATE.start_main_~a~0#1|)) .cse4 (= .cse6 .cse7)) (and .cse12 (<= .cse8 .cse7) (<= .cse13 .cse8) (= |ULTIMATE.start_main_~z~0#1| .cse14) .cse9) (let ((.cse16 (div (+ .cse17 1) 2))) (and .cse15 (= (mod (+ .cse6 1) 2) 0) .cse4 (not (= (mod .cse16 2) 1)) (= (div (* (- 1) .cse16) 2) |ULTIMATE.start_main_~y~0#1|))) (and .cse12 (<= .cse5 .cse8) (<= (div |ULTIMATE.start_main_~b~0#1| 4) .cse1) .cse18 .cse9) (and (<= .cse6 .cse7) .cse2 (<= .cse13 .cse6) .cse4 (= (* 5 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~z~0#1|))))) (= (* |ULTIMATE.start_main_~a~0#1| 8) |ULTIMATE.start_main_~x~0#1|) .cse19 .cse20 .cse21 .cse22) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse19 .cse18 .cse20 .cse21 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse22) (and (or (and (= |ULTIMATE.start_main_~y~0#1| .cse8) .cse18 .cse9) (and (= .cse6 |ULTIMATE.start_main_~y~0#1|) .cse3 .cse4)) .cse19 (= |ULTIMATE.start_main_~x~0#1| .cse23) .cse20 .cse21 .cse22) (and (let ((.cse24 (+ .cse1 1))) (or (and .cse15 .cse4 (= .cse6 .cse24)) (and .cse10 (= .cse24 .cse8) .cse9) (and .cse12 (<= .cse8 .cse24) .cse18 (<= .cse1 .cse8) .cse9) (and (<= .cse6 .cse24) .cse2 .cse3 .cse4 (<= .cse1 .cse6)))) (= |ULTIMATE.start_main_~x~0#1| .cse14) .cse19 .cse20 .cse21 .cse22) (let ((.cse28 (div |ULTIMATE.start_main_~y~0#1| 4))) (and .cse19 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse20 .cse21 (or (and (let ((.cse30 (mod |ULTIMATE.start_main_~y~0#1| 2))) (or (let ((.cse25 (= .cse30 0)) (.cse27 (div |ULTIMATE.start_main_~y~0#1| 2))) (and (let ((.cse26 (+ 1 .cse27))) (or .cse25 (= .cse26 0) (and (not (= (mod .cse26 2) 0)) (= (+ (div .cse26 2) 1) 0)))) (let ((.cse29 (mod .cse27 2))) (or (and (= (+ .cse28 1) 0) (not (= .cse29 0))) (and (<= 0 .cse27) (= .cse29 1)) (not .cse25))))) (and (= .cse30 1) (<= 0 |ULTIMATE.start_main_~y~0#1|)))) (let ((.cse31 (div (+ (- 1) |ULTIMATE.start_main_~y~0#1|) 2))) (or (< |ULTIMATE.start_main_~y~0#1| 0) (= .cse31 0) (and (= (mod .cse31 2) 1) (= (div (+ (- 1) .cse31) 2) 0))))) (= |ULTIMATE.start_main_~y~0#1| 0)) (let ((.cse32 (div |ULTIMATE.start_main_~y~0#1| 8))) (or (= (+ (* 2 |ULTIMATE.start_main_~x~0#1|) (* (* .cse32 |ULTIMATE.start_main_~x~0#1|) 2)) (* |ULTIMATE.start_main_~x~0#1| .cse28)) (= .cse28 (* .cse32 2)))) .cse22))))))) [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 11) the Hoare annotation is: true [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2023-12-02 19:29:26,225 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2023-12-02 19:29:26,226 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 18) the Hoare annotation is: true [2023-12-02 19:29:26,226 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-02 19:29:26,229 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-12-02 19:29:26,231 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 19:29:26,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 07:29:26 BoogieIcfgContainer [2023-12-02 19:29:26,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 19:29:26,257 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 19:29:26,257 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 19:29:26,257 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 19:29:26,257 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:21" (3/4) ... [2023-12-02 19:29:26,259 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 19:29:26,263 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-12-02 19:29:26,263 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-12-02 19:29:26,267 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-12-02 19:29:26,267 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-12-02 19:29:26,267 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 19:29:26,267 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 19:29:26,363 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 19:29:26,364 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 19:29:26,364 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 19:29:26,365 INFO L158 Benchmark]: Toolchain (without parser) took 665331.33ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 113.2MB in the beginning and 58.4MB in the end (delta: 54.8MB). Peak memory consumption was 90.8MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,365 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 71.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:29:26,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.00ms. Allocated memory is still 142.6MB. Free memory was 112.8MB in the beginning and 102.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,366 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.81ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 100.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,366 INFO L158 Benchmark]: Boogie Preprocessor took 19.13ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 99.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,367 INFO L158 Benchmark]: RCFGBuilder took 285.13ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 86.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,367 INFO L158 Benchmark]: TraceAbstraction took 664673.92ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 86.5MB in the beginning and 62.6MB in the end (delta: 23.8MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,368 INFO L158 Benchmark]: Witness Printer took 107.38ms. Allocated memory is still 176.2MB. Free memory was 62.6MB in the beginning and 58.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 19:29:26,370 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 71.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.00ms. Allocated memory is still 142.6MB. Free memory was 112.8MB in the beginning and 102.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.81ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 100.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.13ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 99.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 285.13ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 86.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 664673.92ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 86.5MB in the beginning and 62.6MB in the end (delta: 23.8MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. * Witness Printer took 107.38ms. Allocated memory is still 176.2MB. Free memory was 62.6MB in the beginning and 58.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 664.6s, OverallIterations: 7, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 314.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 97.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 20.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 592 SdHoareTripleChecker+Invalid, 19.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 483 mSDsCounter, 46 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 613 IncrementalHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 46 mSolverCounterUnsat, 109 mSDtfsCounter, 613 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 540 GetRequests, 376 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 400.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 22 PreInvPairs, 37 NumberOfFragments, 2343 HoareAnnotationTreeSize, 22 FomulaSimplifications, 329 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 8 FomulaSimplificationsInter, 26185 FormulaSimplificationTreeSizeReductionInter, 96.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 226.0s InterpolantComputationTime, 236 NumberOfCodeBlocks, 232 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 367 ConstructedInterpolants, 2 QuantifiedInterpolants, 14639 SizeOfPredicates, 32 NumberOfNonLiveVariables, 686 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 555/625 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: 34]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((-1 + b) / 4) <= (2 * y)) && (((((-1 + b) / 2) + (((-1 + (-1 * ((-1 + b) / 2))) / 2) * 2)) + 2) <= 0)) && (a == z)) && ((b % 2) == 1)) && ((y * 4) <= ((-1 + b) / 2))) || (((((y * 4) + 3) == (b / 2)) && (z == (6 * a))) && !(((b % 2) == 1)))) || (((((z == (2 * a)) && (y == ((-1 + (b / 2)) / 4))) && !(((((-1 + (b / 2)) / 2) % 2) == 1))) && (((1 + (b / 2)) % 2) == 0)) && !(((b % 2) == 1)))) || (((z == (7 * a)) && ((b % 2) == 1)) && (((-1 + b) / 2) == ((y * 4) + 3)))) || (((((((2 + ((((-1 * (b / 2)) + -1) / 2) * 2)) + (b / 2)) <= 0) && ((b / 2) <= ((y * 4) + 3))) && (((y * 4) + 2) <= (b / 2))) && (z == (a * 4))) && !(((b % 2) == 1)))) || ((((((3 * a) == z) && (((((-1 + b) / 2) + 1) % 2) == 0)) && ((b % 2) == 1)) && !((((((-1 * ((-1 + b) / 2)) + 1) / 2) % 2) == 1))) && (((-1 * (((-1 * ((-1 + b) / 2)) + 1) / 2)) / 2) == y))) || (((((((2 + ((((-1 * (b / 2)) + -1) / 2) * 2)) + (b / 2)) <= 0) && ((y * 4) <= (b / 2))) && ((b / 4) <= (2 * y))) && (z == 0)) && !(((b % 2) == 1)))) || (((((((-1 + b) / 2) <= ((y * 4) + 3)) && (((((-1 + b) / 2) + (((-1 + (-1 * ((-1 + b) / 2))) / 2) * 2)) + 2) <= 0)) && (((y * 4) + 2) <= ((-1 + b) / 2))) && ((b % 2) == 1)) && ((5 * a) == z))) && ((a * 8) == x)) && (a <= 50)) && (0 <= a)) && (b <= 50)) && (((((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) == 0) || (((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) + -1) / 2) == 0)) || (((-1 + ((-1 + b) / 2)) / 2) == 0)) || (((-1 + b) / 2) == 0)) || (((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2) == 0))) || (((((((b == y) && (a <= 50)) && (z == 0)) && (0 <= a)) && (b <= 50)) && (a == x)) && (((((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) == 0) || (((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) + -1) / 2) == 0)) || (((-1 + ((-1 + b) / 2)) / 2) == 0)) || (((-1 + b) / 2) == 0)) || (((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2) == 0)))) || (((((((((y == (b / 2)) && (z == 0)) && !(((b % 2) == 1))) || (((((-1 + b) / 2) == y) && (a == z)) && ((b % 2) == 1))) && (a <= 50)) && (x == (2 * a))) && (0 <= a)) && (b <= 50)) && (((((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) == 0) || (((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) + -1) / 2) == 0)) || (((-1 + ((-1 + b) / 2)) / 2) == 0)) || (((-1 + b) / 2) == 0)) || (((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2) == 0)))) || ((((((((((((3 * a) == z) && ((b % 2) == 1)) && (((-1 + b) / 2) == ((2 * y) + 1))) || (((z == (2 * a)) && (((2 * y) + 1) == (b / 2))) && !(((b % 2) == 1)))) || (((((((2 + ((((-1 * (b / 2)) + -1) / 2) * 2)) + (b / 2)) <= 0) && ((b / 2) <= ((2 * y) + 1))) && (z == 0)) && ((2 * y) <= (b / 2))) && !(((b % 2) == 1)))) || (((((((-1 + b) / 2) <= ((2 * y) + 1)) && (((((-1 + b) / 2) + (((-1 + (-1 * ((-1 + b) / 2))) / 2) * 2)) + 2) <= 0)) && (a == z)) && ((b % 2) == 1)) && ((2 * y) <= ((-1 + b) / 2)))) && (x == (a * 4))) && (a <= 50)) && (0 <= a)) && (b <= 50)) && (((((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) == 0) || (((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) + -1) / 2) == 0)) || (((-1 + ((-1 + b) / 2)) / 2) == 0)) || (((-1 + b) / 2) == 0)) || (((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2) == 0)))) || (((((((a <= 50) && ((z + (x * y)) == (a * b))) && (0 <= a)) && (b <= 50)) && ((((((((y % 2) == 0) || ((1 + (y / 2)) == 0)) || (!((((1 + (y / 2)) % 2) == 0)) && ((((1 + (y / 2)) / 2) + 1) == 0))) && ((((((y / 4) + 1) == 0) && !((((y / 2) % 2) == 0))) || ((0 <= (y / 2)) && (((y / 2) % 2) == 1))) || !(((y % 2) == 0)))) || (((y % 2) == 1) && (0 <= y))) && (((y < 0) || (((-1 + y) / 2) == 0)) || (((((-1 + y) / 2) % 2) == 1) && (((-1 + ((-1 + y) / 2)) / 2) == 0)))) || (y == 0))) && ((((2 * x) + (((y / 8) * x) * 2)) == (x * (y / 4))) || ((y / 4) == ((y / 8) * 2)))) && (((((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) == 0) || (((((-1 + ((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2)) / 2) + -1) / 2) == 0)) || (((-1 + ((-1 + b) / 2)) / 2) == 0)) || (((-1 + b) / 2) == 0)) || (((-1 + ((-1 + ((-1 + b) / 2)) / 2)) / 2) == 0)))) RESULT: Ultimate proved your program to be correct! [2023-12-02 19:29:26,582 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-12-02 19:29:26,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90774c69-e56d-4276-bea4-b67f0ff098d7/bin/utaipan-verify-nQ1chXbOIh/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