./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/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_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/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_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/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 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:41:36,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:41:36,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:41:36,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:41:36,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:41:36,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:41:36,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:41:36,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:41:36,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:41:36,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:41:36,287 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:41:36,287 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:41:36,288 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:41:36,288 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:41:36,289 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:41:36,289 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:41:36,290 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:41:36,290 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:41:36,291 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:41:36,291 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:41:36,292 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:41:36,295 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:41:36,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:41:36,296 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:41:36,297 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:41:36,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:41:36,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:41:36,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:41:36,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:41:36,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:41:36,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:41:36,300 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:41:36,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:41:36,300 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:41:36,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:41:36,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:41:36,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:41:36,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:41:36,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:41:36,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:41:36,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:41:36,302 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:41:36,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:41:36,302 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:41:36,303 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:41:36,303 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:41:36,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:41:36,303 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_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df [2023-12-02 18:41:36,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:41:36,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:41:36,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:41:36,538 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:41:36,538 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:41:36,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c [2023-12-02 18:41:39,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:41:39,482 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:41:39,483 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c [2023-12-02 18:41:39,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/data/b89031d98/827d3ad7a3c24812825a168e76714141/FLAG61610cbc0 [2023-12-02 18:41:39,501 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/data/b89031d98/827d3ad7a3c24812825a168e76714141 [2023-12-02 18:41:39,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:41:39,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:41:39,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:41:39,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:41:39,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:41:39,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2103b758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39, skipping insertion in model container [2023-12-02 18:41:39,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:41:39,681 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_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2023-12-02 18:41:39,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:41:39,709 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:41:39,721 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_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2023-12-02 18:41:39,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:41:39,742 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:41:39,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39 WrapperNode [2023-12-02 18:41:39,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:41:39,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:41:39,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:41:39,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:41:39,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,778 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-12-02 18:41:39,779 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:41:39,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:41:39,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:41:39,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:41:39,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,795 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:41:39,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:41:39,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:41:39,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:41:39,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (1/1) ... [2023-12-02 18:41:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:41:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:39,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:41:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:41:39,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:41:39,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:41:39,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:41:39,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:41:39,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:41:39,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:41:39,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:41:39,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:41:39,937 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:41:39,939 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:41:40,093 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:41:40,128 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:41:40,128 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:41:40,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:41:40 BoogieIcfgContainer [2023-12-02 18:41:40,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:41:40,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:41:40,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:41:40,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:41:40,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:41:39" (1/3) ... [2023-12-02 18:41:40,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db19e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:41:40, skipping insertion in model container [2023-12-02 18:41:40,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:39" (2/3) ... [2023-12-02 18:41:40,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db19e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:41:40, skipping insertion in model container [2023-12-02 18:41:40,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:41:40" (3/3) ... [2023-12-02 18:41:40,137 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2023-12-02 18:41:40,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:41:40,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:41:40,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:41:40,201 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;@63b48443, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:41:40,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:41:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 18:41:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 18:41:40,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:40,212 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:40,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:40,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1798315609, now seen corresponding path program 1 times [2023-12-02 18:41:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080931469] [2023-12-02 18:41:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:41:40,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:40,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080931469] [2023-12-02 18:41:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080931469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:40,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:40,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:41:40,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354384842] [2023-12-02 18:41:40,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:41:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:41:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:41:40,412 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:40,440 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2023-12-02 18:41:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:41:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 18:41:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:40,447 INFO L225 Difference]: With dead ends: 42 [2023-12-02 18:41:40,447 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 18:41:40,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:41:40,454 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:40,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:41:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 18:41:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 18:41:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 18:41:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-12-02 18:41:40,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2023-12-02 18:41:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:40,486 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-12-02 18:41:40,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-12-02 18:41:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 18:41:40,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:40,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:40,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:41:40,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:40,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -740021117, now seen corresponding path program 1 times [2023-12-02 18:41:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489288952] [2023-12-02 18:41:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:41:40,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:40,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489288952] [2023-12-02 18:41:40,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489288952] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:40,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:40,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:40,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120857928] [2023-12-02 18:41:40,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:40,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:40,617 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:40,648 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-12-02 18:41:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 18:41:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:40,650 INFO L225 Difference]: With dead ends: 34 [2023-12-02 18:41:40,650 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 18:41:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:40,652 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:40,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:41:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 18:41:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 18:41:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 18:41:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-12-02 18:41:40,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2023-12-02 18:41:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:40,662 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-12-02 18:41:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-12-02 18:41:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 18:41:40,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:40,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:41:40,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -738352821, now seen corresponding path program 1 times [2023-12-02 18:41:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134239647] [2023-12-02 18:41:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:40,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:40,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929725465] [2023-12-02 18:41:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:40,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:40,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:40,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:41:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:40,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:41:40,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:41:40,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:40,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134239647] [2023-12-02 18:41:40,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929725465] [2023-12-02 18:41:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929725465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:41:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022063335] [2023-12-02 18:41:40,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:40,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:41:40,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:41:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:41:40,858 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:40,937 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-12-02 18:41:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:41:40,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 18:41:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:40,939 INFO L225 Difference]: With dead ends: 38 [2023-12-02 18:41:40,939 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 18:41:40,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:41:40,942 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:40,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:41:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 18:41:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-12-02 18:41:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 18:41:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2023-12-02 18:41:40,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2023-12-02 18:41:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:40,957 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2023-12-02 18:41:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:41:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2023-12-02 18:41:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:41:40,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:40,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:40,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:41,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:41,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:41,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1930727335, now seen corresponding path program 1 times [2023-12-02 18:41:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:41,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574243842] [2023-12-02 18:41:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:41,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:41,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280613578] [2023-12-02 18:41:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:41,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:41,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:41:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:41,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:41:41,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:41:41,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:41,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:41,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574243842] [2023-12-02 18:41:41,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:41,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280613578] [2023-12-02 18:41:41,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280613578] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:41:41,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301538396] [2023-12-02 18:41:41,550 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 18:41:41,550 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:41,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:41,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:41,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:41:42,186 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 18:41:42,211 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:41:42,262 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:41:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [301538396] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:43,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:41:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 20 [2023-12-02 18:41:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972459992] [2023-12-02 18:41:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:43,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:41:43,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:41:43,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:41:43,325 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:41:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:43,570 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2023-12-02 18:41:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:41:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-12-02 18:41:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:43,571 INFO L225 Difference]: With dead ends: 42 [2023-12-02 18:41:43,572 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 18:41:43,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:41:43,574 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:43,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:41:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 18:41:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-02 18:41:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 18:41:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-12-02 18:41:43,588 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2023-12-02 18:41:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:43,589 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-12-02 18:41:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:41:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-12-02 18:41:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:41:43,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:43,591 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:43,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:41:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:43,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:43,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1385830456, now seen corresponding path program 1 times [2023-12-02 18:41:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766924684] [2023-12-02 18:41:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:43,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451074525] [2023-12-02 18:41:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:43,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:43,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:41:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:43,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:41:43,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:41:43,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:43,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766924684] [2023-12-02 18:41:43,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451074525] [2023-12-02 18:41:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451074525] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:43,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:43,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:41:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23930203] [2023-12-02 18:41:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:43,879 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:41:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:43,927 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-12-02 18:41:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:41:43,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2023-12-02 18:41:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:43,929 INFO L225 Difference]: With dead ends: 48 [2023-12-02 18:41:43,929 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 18:41:43,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 18:41:43,930 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:43,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:41:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 18:41:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-12-02 18:41:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 18:41:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-12-02 18:41:43,944 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 30 [2023-12-02 18:41:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:43,945 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-12-02 18:41:43,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:41:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-12-02 18:41:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:41:43,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:43,946 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:43,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:41:44,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:44,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:44,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1128008437, now seen corresponding path program 1 times [2023-12-02 18:41:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067013600] [2023-12-02 18:41:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:44,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:44,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670657293] [2023-12-02 18:41:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:44,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:44,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:44,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:41:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:44,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:41:44,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:41:44,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:41:44,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067013600] [2023-12-02 18:41:44,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670657293] [2023-12-02 18:41:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670657293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952162620] [2023-12-02 18:41:44,309 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 18:41:44,309 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:44,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:44,309 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:44,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:41:45,598 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:41:45,603 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:41:45,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:41:52,220 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 106 DAG size of output: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:42:04,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:42:04,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:42:04,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:42:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 18:42:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612955292] [2023-12-02 18:42:04,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:04,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:42:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:42:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=410, Unknown=2, NotChecked=0, Total=506 [2023-12-02 18:42:04,928 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 18:42:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:05,079 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2023-12-02 18:42:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:42:05,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2023-12-02 18:42:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:05,082 INFO L225 Difference]: With dead ends: 105 [2023-12-02 18:42:05,082 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 18:42:05,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=114, Invalid=534, Unknown=2, NotChecked=0, Total=650 [2023-12-02 18:42:05,084 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:05,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:42:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 18:42:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2023-12-02 18:42:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:42:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-12-02 18:42:05,102 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 32 [2023-12-02 18:42:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:05,103 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-12-02 18:42:05,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 18:42:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-12-02 18:42:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:42:05,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:05,104 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:05,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:42:05,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:05,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:05,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1126340141, now seen corresponding path program 1 times [2023-12-02 18:42:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:05,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822180715] [2023-12-02 18:42:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:05,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:05,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842832519] [2023-12-02 18:42:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:05,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:05,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:42:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:05,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:42:05,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:42:05,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 18:42:05,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822180715] [2023-12-02 18:42:05,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842832519] [2023-12-02 18:42:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842832519] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:42:05,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:42:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-02 18:42:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706364206] [2023-12-02 18:42:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:42:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:42:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:42:05,885 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:42:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:05,962 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-02 18:42:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-12-02 18:42:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:05,965 INFO L225 Difference]: With dead ends: 101 [2023-12-02 18:42:05,965 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 18:42:05,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:42:05,966 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:05,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:42:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 18:42:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 18:42:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 60 states have internal predecessors, (64), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:42:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-12-02 18:42:05,990 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 32 [2023-12-02 18:42:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:05,991 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-12-02 18:42:05,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:42:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-12-02 18:42:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:42:05,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:05,992 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:05,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:42:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:06,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:06,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2087905654, now seen corresponding path program 1 times [2023-12-02 18:42:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:06,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412050682] [2023-12-02 18:42:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:06,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:06,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314613740] [2023-12-02 18:42:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:06,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:06,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:06,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:06,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:42:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:06,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:42:06,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:42:06,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:42:06,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:06,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412050682] [2023-12-02 18:42:06,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:06,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314613740] [2023-12-02 18:42:06,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314613740] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:06,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445321134] [2023-12-02 18:42:06,445 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 18:42:06,445 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:42:06,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:42:06,446 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:42:06,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:42:06,883 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 18:42:06,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:42:06,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:42:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [445321134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:08,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:42:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 8] total 23 [2023-12-02 18:42:08,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286659313] [2023-12-02 18:42:08,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 18:42:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 18:42:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:42:08,084 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 18:42:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:08,312 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2023-12-02 18:42:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:42:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2023-12-02 18:42:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:08,314 INFO L225 Difference]: With dead ends: 101 [2023-12-02 18:42:08,314 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 18:42:08,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:42:08,315 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:08,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:42:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 18:42:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 18:42:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 55 states have internal predecessors, (58), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 18:42:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2023-12-02 18:42:08,327 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2023-12-02 18:42:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:08,327 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2023-12-02 18:42:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 18:42:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2023-12-02 18:42:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:42:08,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:08,329 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:08,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:42:08,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 18:42:08,534 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:08,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:08,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1860492319, now seen corresponding path program 2 times [2023-12-02 18:42:08,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:08,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675437578] [2023-12-02 18:42:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:08,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:08,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:08,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723012895] [2023-12-02 18:42:08,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:42:08,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:08,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:08,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:08,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:42:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:42:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:08,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:42:08,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 18:42:08,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:42:09,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675437578] [2023-12-02 18:42:09,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723012895] [2023-12-02 18:42:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723012895] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063939949] [2023-12-02 18:42:09,314 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:42:09,315 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:42:09,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:42:09,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:42:09,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:42:10,278 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:42:10,283 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:42:10,304 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:42:30,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2561#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:42:30,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:42:30,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:42:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-12-02 18:42:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625720037] [2023-12-02 18:42:30,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:30,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:42:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:42:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2023-12-02 18:42:30,346 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:42:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:34,290 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2023-12-02 18:42:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:42:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 37 [2023-12-02 18:42:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:34,292 INFO L225 Difference]: With dead ends: 104 [2023-12-02 18:42:34,292 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 18:42:34,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=140, Invalid=848, Unknown=4, NotChecked=0, Total=992 [2023-12-02 18:42:34,293 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:34,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 144 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:42:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 18:42:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2023-12-02 18:42:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 61 states have internal predecessors, (64), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 18:42:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-12-02 18:42:34,317 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 37 [2023-12-02 18:42:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:34,317 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-12-02 18:42:34,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:42:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-12-02 18:42:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:42:34,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:34,319 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:34,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:42:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:34,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:34,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash -209579757, now seen corresponding path program 3 times [2023-12-02 18:42:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:34,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727324285] [2023-12-02 18:42:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:34,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:34,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354061278] [2023-12-02 18:42:34,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:42:34,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:34,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:42:34,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:42:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:34,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 18:42:34,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 18:42:35,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:42:35,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727324285] [2023-12-02 18:42:35,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:35,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354061278] [2023-12-02 18:42:35,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354061278] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:35,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965730303] [2023-12-02 18:42:35,847 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:42:35,847 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:42:35,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:42:35,847 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:42:35,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:42:36,621 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:42:36,626 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:42:36,659 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:43:00,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3146#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:43:00,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:43:00,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:43:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-12-02 18:43:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254499746] [2023-12-02 18:43:00,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:43:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:43:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=798, Unknown=5, NotChecked=0, Total=930 [2023-12-02 18:43:00,551 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 18:43:03,896 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 18:43:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:07,901 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2023-12-02 18:43:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:43:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 42 [2023-12-02 18:43:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:07,903 INFO L225 Difference]: With dead ends: 116 [2023-12-02 18:43:07,903 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 18:43:07,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=179, Invalid=1076, Unknown=5, NotChecked=0, Total=1260 [2023-12-02 18:43:07,904 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:07,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 18:43:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 18:43:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2023-12-02 18:43:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 18:43:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2023-12-02 18:43:07,920 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 42 [2023-12-02 18:43:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:07,920 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2023-12-02 18:43:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 18:43:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2023-12-02 18:43:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 18:43:07,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:07,921 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:07,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:43:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:43:08,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:08,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 484799234, now seen corresponding path program 1 times [2023-12-02 18:43:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:08,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415191261] [2023-12-02 18:43:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:08,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:08,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733405904] [2023-12-02 18:43:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:08,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:08,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:08,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:08,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:43:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:08,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:43:08,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 18:43:08,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 18:43:08,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415191261] [2023-12-02 18:43:08,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733405904] [2023-12-02 18:43:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733405904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330862996] [2023-12-02 18:43:08,380 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 18:43:08,380 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:43:08,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:43:08,381 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:43:08,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:43:09,723 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:43:09,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:43:09,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:43:20,035 WARN L293 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 106 DAG size of output: 106 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:43:28,729 WARN L293 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 109 DAG size of output: 108 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:43:59,840 WARN L293 SmtUtils]: Spent 13.09s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:43:59,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3801#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:43:59,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:43:59,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:43:59,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-12-02 18:43:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065441845] [2023-12-02 18:43:59,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:59,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:43:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:43:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=639, Unknown=7, NotChecked=0, Total=756 [2023-12-02 18:43:59,843 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 18:44:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:00,052 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2023-12-02 18:44:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:44:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2023-12-02 18:44:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:00,054 INFO L225 Difference]: With dead ends: 106 [2023-12-02 18:44:00,054 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 18:44:00,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=126, Invalid=737, Unknown=7, NotChecked=0, Total=870 [2023-12-02 18:44:00,055 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:00,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 125 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:44:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 18:44:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-02 18:44:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 18:44:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2023-12-02 18:44:00,071 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 53 [2023-12-02 18:44:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:00,071 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2023-12-02 18:44:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 18:44:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2023-12-02 18:44:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 18:44:00,072 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:00,072 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:00,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:44:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 18:44:00,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:00,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1893559055, now seen corresponding path program 4 times [2023-12-02 18:44:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348838950] [2023-12-02 18:44:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:00,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:44:00,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608625747] [2023-12-02 18:44:00,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:44:00,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:00,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:00,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:00,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:44:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:00,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 18:44:00,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 74 proven. 49 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-12-02 18:44:05,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 91 proven. 17 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-12-02 18:44:09,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348838950] [2023-12-02 18:44:09,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:44:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608625747] [2023-12-02 18:44:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608625747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:09,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831606706] [2023-12-02 18:44:09,173 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:44:09,173 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:44:09,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:44:09,173 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:44:09,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:44:10,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:44:10,040 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:44:10,060 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:44:30,147 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 109 DAG size of output: 108 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:44:40,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4545#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:44:40,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:44:40,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:44:40,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-12-02 18:44:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963726502] [2023-12-02 18:44:40,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:40,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:44:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:44:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1032, Unknown=5, NotChecked=0, Total=1190 [2023-12-02 18:44:40,706 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 20 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2023-12-02 18:44:49,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 18:44:50,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 18:44:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:58,177 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2023-12-02 18:44:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:44:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) Word has length 73 [2023-12-02 18:44:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:58,179 INFO L225 Difference]: With dead ends: 106 [2023-12-02 18:44:58,179 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 18:44:58,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=238, Invalid=1477, Unknown=7, NotChecked=0, Total=1722 [2023-12-02 18:44:58,180 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:58,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 304 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 283 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:44:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 18:44:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-12-02 18:44:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 62 states have internal predecessors, (62), 19 states have call successors, (19), 15 states have call predecessors, (19), 15 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 18:44:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-12-02 18:44:58,202 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 73 [2023-12-02 18:44:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:58,202 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-12-02 18:44:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.235294117647059) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2023-12-02 18:44:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-12-02 18:44:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 18:44:58,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:58,203 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:58,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:44:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 18:44:58,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:58,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -510598493, now seen corresponding path program 2 times [2023-12-02 18:44:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594324716] [2023-12-02 18:44:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:58,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:44:58,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116744094] [2023-12-02 18:44:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:44:58,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:58,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:58,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:58,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:44:58,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 18:44:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:58,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:44:58,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 18:44:59,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-12-02 18:44:59,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594324716] [2023-12-02 18:44:59,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:44:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116744094] [2023-12-02 18:44:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116744094] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78062652] [2023-12-02 18:44:59,212 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 18:44:59,212 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:44:59,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:44:59,213 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:44:59,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:44:59,993 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:44:59,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 18:45:00,021 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:45:09,989 WARN L293 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:45:23,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5388#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:45:23,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:45:23,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:45:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 18:45:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289118328] [2023-12-02 18:45:23,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:45:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:45:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:45:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:45:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=634, Unknown=4, NotChecked=0, Total=812 [2023-12-02 18:45:23,755 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-12-02 18:45:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:45:24,265 INFO L93 Difference]: Finished difference Result 212 states and 223 transitions. [2023-12-02 18:45:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 18:45:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2023-12-02 18:45:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:45:24,267 INFO L225 Difference]: With dead ends: 212 [2023-12-02 18:45:24,267 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 18:45:24,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=287, Invalid=1115, Unknown=4, NotChecked=0, Total=1406 [2023-12-02 18:45:24,269 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:45:24,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 146 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:45:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 18:45:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-12-02 18:45:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-02 18:45:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2023-12-02 18:45:24,315 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 86 [2023-12-02 18:45:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:45:24,315 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2023-12-02 18:45:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-12-02 18:45:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2023-12-02 18:45:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-12-02 18:45:24,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:45:24,317 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:45:24,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:45:24,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:24,518 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:45:24,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:45:24,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1184159699, now seen corresponding path program 3 times [2023-12-02 18:45:24,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:45:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49462101] [2023-12-02 18:45:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:24,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:45:24,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:45:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081947154] [2023-12-02 18:45:24,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:45:24,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:45:24,532 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:45:24,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:45:24,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:45:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-02 18:45:24,678 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 18:45:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 18:45:24,823 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 18:45:24,823 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 18:45:24,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:45:24,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:45:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 18:45:25,030 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:45:25,034 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:45:25,071 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,073 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,075 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,078 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,079 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,081 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,083 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,084 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,086 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:45:25 BoogieIcfgContainer [2023-12-02 18:45:25,106 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:45:25,107 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:45:25,107 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:45:25,107 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:45:25,107 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:41:40" (3/4) ... [2023-12-02 18:45:25,108 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 18:45:25,123 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,124 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,125 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,126 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,127 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,128 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,129 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,130 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,131 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,132 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,133 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 18:45:25,192 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 18:45:25,192 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:45:25,193 INFO L158 Benchmark]: Toolchain (without parser) took 225687.42ms. Allocated memory was 148.9MB in the beginning and 262.1MB in the end (delta: 113.2MB). Free memory was 106.1MB in the beginning and 207.2MB in the end (delta: -101.1MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,193 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 102.8MB. Free memory was 72.4MB in the beginning and 72.4MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:45:25,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 148.9MB. Free memory was 105.7MB in the beginning and 94.8MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,194 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.50ms. Allocated memory is still 148.9MB. Free memory was 94.8MB in the beginning and 93.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:45:25,194 INFO L158 Benchmark]: Boogie Preprocessor took 22.55ms. Allocated memory is still 148.9MB. Free memory was 93.5MB in the beginning and 92.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,194 INFO L158 Benchmark]: RCFGBuilder took 326.97ms. Allocated memory is still 148.9MB. Free memory was 92.3MB in the beginning and 117.3MB in the end (delta: -25.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,195 INFO L158 Benchmark]: TraceAbstraction took 224975.06ms. Allocated memory was 148.9MB in the beginning and 262.1MB in the end (delta: 113.2MB). Free memory was 116.5MB in the beginning and 215.6MB in the end (delta: -99.1MB). Peak memory consumption was 159.3MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,195 INFO L158 Benchmark]: Witness Printer took 85.25ms. Allocated memory is still 262.1MB. Free memory was 215.6MB in the beginning and 207.2MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 18:45:25,197 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 102.8MB. Free memory was 72.4MB in the beginning and 72.4MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 148.9MB. Free memory was 105.7MB in the beginning and 94.8MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.50ms. Allocated memory is still 148.9MB. Free memory was 94.8MB in the beginning and 93.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.55ms. Allocated memory is still 148.9MB. Free memory was 93.5MB in the beginning and 92.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 326.97ms. Allocated memory is still 148.9MB. Free memory was 92.3MB in the beginning and 117.3MB in the end (delta: -25.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * TraceAbstraction took 224975.06ms. Allocated memory was 148.9MB in the beginning and 262.1MB in the end (delta: 113.2MB). Free memory was 116.5MB in the beginning and 215.6MB in the end (delta: -99.1MB). Peak memory consumption was 159.3MB. Max. memory is 16.1GB. * Witness Printer took 85.25ms. Allocated memory is still 262.1MB. Free memory was 215.6MB in the beginning and 207.2MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=153, y=43] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=153, y=43] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=153, b=43, counter=0, p=1, q=0, r=0, s=1, x=153, y=43] [L34] EXPR counter++ VAL [a=153, b=43, counter=1, p=1, q=0, r=0, s=1, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=153, b=43, counter=1, p=1, q=0, r=0, s=1, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=153, b=43, counter=1, p=1, q=0, r=0, s=1, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=153, b=43, counter=1, p=1, q=0, r=0, s=1, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=110, b=43, counter=1, p=1, q=0, r=-1, s=1, x=153, y=43] [L34] EXPR counter++ VAL [a=110, b=43, counter=2, p=1, q=0, r=-1, s=1, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=110, b=43, counter=2, p=1, q=0, r=-1, s=1, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=110, b=43, counter=2, p=1, q=0, r=-1, s=1, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=110, b=43, counter=2, p=1, q=0, r=-1, s=1, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=67, b=43, counter=2, p=1, q=0, r=-2, s=1, x=153, y=43] [L34] EXPR counter++ VAL [a=67, b=43, counter=3, p=1, q=0, r=-2, s=1, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=67, b=43, counter=3, p=1, q=0, r=-2, s=1, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=67, b=43, counter=3, p=1, q=0, r=-2, s=1, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=67, b=43, counter=3, p=1, q=0, r=-2, s=1, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=24, b=43, counter=3, p=1, q=0, r=-3, s=1, x=153, y=43] [L34] EXPR counter++ VAL [a=24, b=43, counter=4, p=1, q=0, r=-3, s=1, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=24, b=43, counter=4, p=1, q=0, r=-3, s=1, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=24, b=43, counter=4, p=1, q=0, r=-3, s=1, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=24, b=43, counter=4, p=1, q=0, r=-3, s=1, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=24, b=19, counter=4, p=1, q=-1, r=-3, s=4, x=153, y=43] [L34] EXPR counter++ VAL [a=24, b=19, counter=5, p=1, q=-1, r=-3, s=4, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=24, b=19, counter=5, p=1, q=-1, r=-3, s=4, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=24, b=19, counter=5, p=1, q=-1, r=-3, s=4, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=24, b=19, counter=5, p=1, q=-1, r=-3, s=4, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=5, b=19, counter=5, p=2, q=-1, r=-7, s=4, x=153, y=43] [L34] EXPR counter++ VAL [a=5, b=19, counter=6, p=2, q=-1, r=-7, s=4, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=19, counter=6, p=2, q=-1, r=-7, s=4, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=19, counter=6, p=2, q=-1, r=-7, s=4, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=19, counter=6, p=2, q=-1, r=-7, s=4, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=14, counter=6, p=2, q=-3, r=-7, s=11, x=153, y=43] [L34] EXPR counter++ VAL [a=5, b=14, counter=7, p=2, q=-3, r=-7, s=11, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=14, counter=7, p=2, q=-3, r=-7, s=11, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=14, counter=7, p=2, q=-3, r=-7, s=11, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=14, counter=7, p=2, q=-3, r=-7, s=11, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=9, counter=7, p=2, q=-5, r=-7, s=18, x=153, y=43] [L34] EXPR counter++ VAL [a=5, b=9, counter=8, p=2, q=-5, r=-7, s=18, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=9, counter=8, p=2, q=-5, r=-7, s=18, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=9, counter=8, p=2, q=-5, r=-7, s=18, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=9, counter=8, p=2, q=-5, r=-7, s=18, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=4, counter=8, p=2, q=-7, r=-7, s=25, x=153, y=43] [L34] EXPR counter++ VAL [a=5, b=4, counter=9, p=2, q=-7, r=-7, s=25, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=4, counter=9, p=2, q=-7, r=-7, s=25, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=4, counter=9, p=2, q=-7, r=-7, s=25, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=4, counter=9, p=2, q=-7, r=-7, s=25, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=1, b=4, counter=9, p=9, q=-7, r=-32, s=25, x=153, y=43] [L34] EXPR counter++ VAL [a=1, b=4, counter=10, p=9, q=-7, r=-32, s=25, x=153, y=43] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=1, b=4, counter=10, p=9, q=-7, r=-32, s=25, x=153, y=43] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=1, b=4, counter=10, p=9, q=-7, r=-32, s=25, x=153, y=43] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=1, b=4, counter=10, p=9, q=-7, r=-32, s=25, x=153, y=43] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=1, b=3, counter=10, p=9, q=-16, r=-32, s=57, x=153, y=43] [L34] EXPR counter++ VAL [a=1, b=3, counter=11, p=9, q=-16, r=-32, s=57, x=153, y=43] [L34] COND FALSE !(counter++<10) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 224.9s, OverallIterations: 14, TraceHistogramMax: 31, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 30.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 217 mSDsluCounter, 1457 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1156 mSDsCounter, 195 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1293 IncrementalHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 195 mSolverCounterUnsat, 301 mSDtfsCounter, 1293 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1250 GetRequests, 987 SyntacticMatches, 9 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 194.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=13, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 674 NumberOfCodeBlocks, 653 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 849 ConstructedInterpolants, 0 QuantifiedInterpolants, 6234 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1256 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 1303/1722 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: OVERALL_TIME: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 29, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME: 0.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 102, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 33, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 4, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 392, DAG_COMPRESSION_RETAINED_NODES: 110, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 18:45:25,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d6331e6-fc2b-4077-a6cd-d1891a5a5ca6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE