./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version b5237d83
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-b5237d8
[2022-11-21 16:59:15,184 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-21 16:59:15,186 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-21 16:59:15,205 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-21 16:59:15,206 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-21 16:59:15,207 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-21 16:59:15,208 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-21 16:59:15,210 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-21 16:59:15,212 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-21 16:59:15,213 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-21 16:59:15,214 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-21 16:59:15,215 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-21 16:59:15,216 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-21 16:59:15,217 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-21 16:59:15,218 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-21 16:59:15,219 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-21 16:59:15,220 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-21 16:59:15,221 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-21 16:59:15,223 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-21 16:59:15,225 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-21 16:59:15,231 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-21 16:59:15,236 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-21 16:59:15,238 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-21 16:59:15,239 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-21 16:59:15,246 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-21 16:59:15,247 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-21 16:59:15,253 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-21 16:59:15,254 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-21 16:59:15,255 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-21 16:59:15,256 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-21 16:59:15,256 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-21 16:59:15,257 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-21 16:59:15,258 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-21 16:59:15,259 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-21 16:59:15,262 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-21 16:59:15,262 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-21 16:59:15,263 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-21 16:59:15,264 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-21 16:59:15,264 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-21 16:59:15,266 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-21 16:59:15,269 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-21 16:59:15,270 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-21 16:59:15,302 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-21 16:59:15,302 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-21 16:59:15,303 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-21 16:59:15,303 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-21 16:59:15,304 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-21 16:59:15,305 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-21 16:59:15,305 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-21 16:59:15,306 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-21 16:59:15,306 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-21 16:59:15,306 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-21 16:59:15,307 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-21 16:59:15,308 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-21 16:59:15,308 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-21 16:59:15,308 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-21 16:59:15,308 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-21 16:59:15,308 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-21 16:59:15,309 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-21 16:59:15,309 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-21 16:59:15,309 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-21 16:59:15,309 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-21 16:59:15,309 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-21 16:59:15,310 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-21 16:59:15,310 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-21 16:59:15,310 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-21 16:59:15,310 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-21 16:59:15,311 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-21 16:59:15,311 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-21 16:59:15,311 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-21 16:59:15,312 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-21 16:59:15,312 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-21 16:59:15,312 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-21 16:59:15,312 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-21 16:59:15,313 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-21 16:59:15,313 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde
[2022-11-21 16:59:15,594 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-21 16:59:15,631 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-21 16:59:15,633 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-21 16:59:15,635 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-21 16:59:15,635 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-21 16:59:15,636 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/bitvector/gcd_1.c
[2022-11-21 16:59:18,593 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2022-11-21 16:59:18,798 INFO  L351              CDTParser]: Found 1 translation units.
[2022-11-21 16:59:18,799 INFO  L172              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/sv-benchmarks/c/bitvector/gcd_1.c
[2022-11-21 16:59:18,807 INFO  L394              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/data/0a6323916/cc2aef86d784468b893fc99bc5398f44/FLAGe43f1b5be
[2022-11-21 16:59:18,824 INFO  L402              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/data/0a6323916/cc2aef86d784468b893fc99bc5398f44
[2022-11-21 16:59:18,827 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-21 16:59:18,829 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-21 16:59:18,830 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-21 16:59:18,830 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-21 16:59:18,834 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-21 16:59:18,835 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:18" (1/1) ...
[2022-11-21 16:59:18,836 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628e7153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:18, skipping insertion in model container
[2022-11-21 16:59:18,836 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:18" (1/1) ...
[2022-11-21 16:59:18,844 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-21 16:59:18,858 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-21 16:59:19,004 WARN  L237   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/sv-benchmarks/c/bitvector/gcd_1.c[664,677]
[2022-11-21 16:59:19,019 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-21 16:59:19,029 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-21 16:59:19,043 WARN  L237   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/sv-benchmarks/c/bitvector/gcd_1.c[664,677]
[2022-11-21 16:59:19,048 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-21 16:59:19,061 INFO  L208         MainTranslator]: Completed translation
[2022-11-21 16:59:19,061 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19 WrapperNode
[2022-11-21 16:59:19,062 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-21 16:59:19,062 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-21 16:59:19,063 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-21 16:59:19,063 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-21 16:59:19,069 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,075 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,095 INFO  L138                Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55
[2022-11-21 16:59:19,095 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-21 16:59:19,096 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-21 16:59:19,096 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-21 16:59:19,096 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-21 16:59:19,106 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,107 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,108 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,108 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,112 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,115 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,116 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,117 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,119 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-21 16:59:19,120 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-21 16:59:19,120 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-21 16:59:19,120 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-21 16:59:19,121 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (1/1) ...
[2022-11-21 16:59:19,132 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-21 16:59:19,146 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3
[2022-11-21 16:59:19,158 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-21 16:59:19,194 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-21 16:59:19,214 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-21 16:59:19,215 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-21 16:59:19,215 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-21 16:59:19,215 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-21 16:59:19,278 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-21 16:59:19,281 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-21 16:59:19,425 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-21 16:59:19,432 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-21 16:59:19,432 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-21 16:59:19,434 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:19 BoogieIcfgContainer
[2022-11-21 16:59:19,434 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-21 16:59:19,437 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-21 16:59:19,437 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-21 16:59:19,441 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-21 16:59:19,441 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:59:18" (1/3) ...
[2022-11-21 16:59:19,442 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c36b27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:19, skipping insertion in model container
[2022-11-21 16:59:19,442 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:19" (2/3) ...
[2022-11-21 16:59:19,443 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c36b27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:19, skipping insertion in model container
[2022-11-21 16:59:19,443 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:19" (3/3) ...
[2022-11-21 16:59:19,444 INFO  L112   eAbstractionObserver]: Analyzing ICFG gcd_1.c
[2022-11-21 16:59:19,465 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-21 16:59:19,465 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-21 16:59:19,516 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-21 16:59:19,523 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@147f19ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-21 16:59:19,524 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-21 16:59:19,528 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:19,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-11-21 16:59:19,535 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-21 16:59:19,536 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-21 16:59:19,536 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-21 16:59:19,542 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-21 16:59:19,542 INFO  L85        PathProgramCache]: Analyzing trace with hash -2002478831, now seen corresponding path program 1 times
[2022-11-21 16:59:19,552 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-21 16:59:19,553 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190301662]
[2022-11-21 16:59:19,553 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 16:59:19,554 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-21 16:59:19,711 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-21 16:59:19,712 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706738411]
[2022-11-21 16:59:19,712 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 16:59:19,713 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-21 16:59:19,713 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3
[2022-11-21 16:59:19,716 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-21 16:59:19,743 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-21 16:59:19,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-21 16:59:19,840 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-11-21 16:59:19,857 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-21 16:59:19,971 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-21 16:59:19,971 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-21 16:59:19,971 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-21 16:59:19,972 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190301662]
[2022-11-21 16:59:19,972 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-21 16:59:19,972 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706738411]
[2022-11-21 16:59:19,973 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706738411] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-21 16:59:19,973 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-21 16:59:19,973 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-21 16:59:19,976 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050697526]
[2022-11-21 16:59:19,976 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-21 16:59:19,980 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-21 16:59:19,981 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-21 16:59:20,048 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-21 16:59:20,063 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-21 16:59:20,065 INFO  L87              Difference]: Start difference. First operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,108 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-21 16:59:20,108 INFO  L93              Difference]: Finished difference Result 28 states and 37 transitions.
[2022-11-21 16:59:20,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-21 16:59:20,112 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2022-11-21 16:59:20,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-21 16:59:20,121 INFO  L225             Difference]: With dead ends: 28
[2022-11-21 16:59:20,121 INFO  L226             Difference]: Without dead ends: 12
[2022-11-21 16:59:20,124 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-21 16:59:20,130 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-21 16:59:20,132 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-21 16:59:20,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2022-11-21 16:59:20,163 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2022-11-21 16:59:20,164 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,165 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2022-11-21 16:59:20,166 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10
[2022-11-21 16:59:20,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-21 16:59:20,167 INFO  L495      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2022-11-21 16:59:20,168 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2022-11-21 16:59:20,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-11-21 16:59:20,169 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-21 16:59:20,170 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-21 16:59:20,179 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-21 16:59:20,375 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2022-11-21 16:59:20,376 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-21 16:59:20,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-21 16:59:20,377 INFO  L85        PathProgramCache]: Analyzing trace with hash -1895646932, now seen corresponding path program 1 times
[2022-11-21 16:59:20,377 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-21 16:59:20,378 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809646827]
[2022-11-21 16:59:20,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 16:59:20,378 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-21 16:59:20,413 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-21 16:59:20,413 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684944453]
[2022-11-21 16:59:20,413 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 16:59:20,414 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-21 16:59:20,414 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3
[2022-11-21 16:59:20,417 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-21 16:59:20,448 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-21 16:59:20,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-21 16:59:20,517 INFO  L263         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-11-21 16:59:20,519 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-21 16:59:20,610 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-21 16:59:20,610 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-21 16:59:20,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-21 16:59:20,666 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-21 16:59:20,666 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809646827]
[2022-11-21 16:59:20,666 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-21 16:59:20,666 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684944453]
[2022-11-21 16:59:20,667 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684944453] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-21 16:59:20,667 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-21 16:59:20,667 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2022-11-21 16:59:20,667 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910112741]
[2022-11-21 16:59:20,668 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-21 16:59:20,668 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-11-21 16:59:20,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-21 16:59:20,669 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-11-21 16:59:20,669 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2022-11-21 16:59:20,670 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. Second operand  has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,748 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-21 16:59:20,748 INFO  L93              Difference]: Finished difference Result 18 states and 19 transitions.
[2022-11-21 16:59:20,748 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-21 16:59:20,749 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2022-11-21 16:59:20,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-21 16:59:20,749 INFO  L225             Difference]: With dead ends: 18
[2022-11-21 16:59:20,750 INFO  L226             Difference]: Without dead ends: 13
[2022-11-21 16:59:20,750 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2022-11-21 16:59:20,751 INFO  L413           NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-21 16:59:20,752 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-21 16:59:20,753 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-11-21 16:59:20,755 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-11-21 16:59:20,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2022-11-21 16:59:20,756 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11
[2022-11-21 16:59:20,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-21 16:59:20,756 INFO  L495      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2022-11-21 16:59:20,757 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 16:59:20,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2022-11-21 16:59:20,757 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-11-21 16:59:20,758 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-21 16:59:20,758 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-21 16:59:20,767 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-21 16:59:20,964 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2022-11-21 16:59:20,965 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-21 16:59:20,965 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-21 16:59:20,965 INFO  L85        PathProgramCache]: Analyzing trace with hash 1416141937, now seen corresponding path program 2 times
[2022-11-21 16:59:20,966 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-21 16:59:20,966 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159285911]
[2022-11-21 16:59:20,966 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 16:59:20,966 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-21 16:59:20,978 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-21 16:59:20,983 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955095474]
[2022-11-21 16:59:20,983 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-21 16:59:20,983 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-21 16:59:20,984 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3
[2022-11-21 16:59:20,985 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-21 16:59:20,994 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-21 16:59:26,806 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-21 16:59:26,806 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-21 16:59:26,815 INFO  L263         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 40 conjunts are in the unsatisfiable core
[2022-11-21 16:59:26,818 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-21 17:00:24,168 WARN  L837   $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false
[2022-11-21 17:00:44,495 WARN  L837   $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false
[2022-11-21 17:01:05,891 WARN  L837   $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false
[2022-11-21 17:01:25,015 WARN  L837   $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false
[2022-11-21 17:01:27,028 WARN  L859   $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true
[2022-11-21 17:01:44,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked.
[2022-11-21 17:01:44,950 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-21 17:08:45,503 WARN  L233               SmtUtils]: Spent 5.85m on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-21 17:10:14,771 WARN  L233               SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-21 17:10:35,544 WARN  L233               SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-21 17:10:55,852 WARN  L859   $PredicateComparison]: unable to prove that (or (<= 0 |c_ULTIMATE.start_main_~x~0#1|) (not (< 0 |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|) 0)) (let ((.cse2 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse1 (<= .cse2 127))) (and (let ((.cse0 (mod (+ (- 256) .cse2) |c_ULTIMATE.start_main_~y~0#1|))) (or (= .cse0 0) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| (+ (- 256) (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse0) 256))) 256) 0)) .cse1)) (let ((.cse3 (mod (mod .cse2 |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse3) 256) 0)) (not .cse1) (= .cse3 0))))))) is different from true
[2022-11-21 17:11:46,639 WARN  L837   $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main_~x~0#1_5|) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (<= |v_ULTIMATE.start_main_~y~0#1_6| 0) (< (+ |v_ULTIMATE.start_main_~x~0#1_5| 128) 0) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|) 0)) (not (= (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256) 0))))) is different from false
[2022-11-21 17:11:48,641 WARN  L859   $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main_~x~0#1_5|) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (<= |v_ULTIMATE.start_main_~y~0#1_6| 0) (< (+ |v_ULTIMATE.start_main_~x~0#1_5| 128) 0) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|) 0)) (not (= (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256) 0))))) is different from true
[2022-11-21 17:11:48,642 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-21 17:11:48,642 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-21 17:11:48,643 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159285911]
[2022-11-21 17:11:48,643 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-21 17:11:48,643 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955095474]
[2022-11-21 17:11:48,643 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [955095474] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-21 17:11:48,643 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-21 17:11:48,643 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19
[2022-11-21 17:11:48,644 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071333481]
[2022-11-21 17:11:48,644 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-21 17:11:48,644 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-11-21 17:11:48,644 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-21 17:11:48,645 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-11-21 17:11:48,645 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=114, Unknown=23, NotChecked=162, Total=342
[2022-11-21 17:11:48,646 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 17:13:28,383 WARN  L233               SmtUtils]: Spent 1.44m on a formula simplification. DAG size of input: 45 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-21 17:13:30,077 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]
[2022-11-21 17:13:32,089 WARN  L837   $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ |c_ULTIMATE.start_main_~x~0#1| 128)) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false
[2022-11-21 17:14:40,678 WARN  L233               SmtUtils]: Spent 57.46s on a formula simplification. DAG size of input: 83 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-21 17:14:42,888 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]
[2022-11-21 17:14:44,935 WARN  L837   $PredicateComparison]: unable to prove that (and (or (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse29 (mod (+ .cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse28 (mod (+ .cse19 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse21 (mod .cse19 256)) (.cse11 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (= .cse28 0)) (.cse0 (<= .cse28 127)) (.cse12 (<= .cse29 127)) (.cse15 (= .cse29 0)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse7 (not .cse20))) (let ((.cse14 (or .cse15 .cse16 .cse7)) (.cse17 (not .cse12)) (.cse9 (not .cse0)) (.cse10 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse13 (or .cse5 .cse7 .cse8)) (.cse3 (not .cse11)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse22 (<= .cse21 127))) (and (or (let ((.cse4 (or .cse20 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256) 0)) (= .cse21 0))) (.cse6 (= .cse19 0))) (let ((.cse2 (or .cse3 (and .cse4 (or .cse6 .cse18 .cse7))))) (and (or (let ((.cse1 (or (and (or .cse6 .cse10 .cse7) .cse4) .cse11))) (and (or .cse0 (and .cse1 .cse2)) (or (and (or .cse3 (and .cse4 (or .cse5 .cse6 .cse7 .cse8))) .cse1) .cse9))) .cse12) (or (and (or (and (or .cse3 (and .cse4 .cse13)) (or (and .cse4 .cse14) .cse11)) .cse9) (or (and (or .cse11 (and .cse4 (or .cse6 .cse15 .cse16 .cse7))) .cse2) .cse0)) .cse17)))) (not .cse22)) (or (let ((.cse26 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse21)) 256) 0)) .cse20))) (let ((.cse24 (or .cse3 (and (or .cse18 .cse7) .cse26))) (.cse25 (or .cse3 (and .cse26 .cse13)))) (and (or (let ((.cse23 (or (and .cse26 .cse14) .cse11))) (and (or (and .cse23 .cse24) .cse0) (or .cse9 (and .cse25 .cse23)))) .cse17) (or (let ((.cse27 (or .cse11 (and (or .cse10 .cse7) .cse26)))) (and (or (and .cse24 .cse27) .cse0) (or (and .cse25 .cse27) .cse9))) .cse12)))) .cse22)))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse30 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse30 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse30) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse31 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse31 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse31) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from false
[2022-11-21 17:14:47,460 WARN  L837   $PredicateComparison]: unable to prove that (and (or (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 128))) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256) 0)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse0 127) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (let ((.cse1 (mod (+ (- 256) .cse2) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse1 0) (not (<= .cse2 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) (< 0 |c_ULTIMATE.start_gcd_test_~a#1|)) is different from false
[2022-11-21 17:14:49,469 WARN  L837   $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false
[2022-11-21 17:14:51,603 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-11-21 17:14:51,616 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-21 17:14:51,616 INFO  L93              Difference]: Finished difference Result 22 states and 23 transitions.
[2022-11-21 17:14:51,617 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-11-21 17:14:51,617 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12
[2022-11-21 17:14:51,617 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-21 17:14:51,618 INFO  L225             Difference]: With dead ends: 22
[2022-11-21 17:14:51,618 INFO  L226             Difference]: Without dead ends: 17
[2022-11-21 17:14:51,619 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 665.6s TimeCoverageRelationStatistics Valid=61, Invalid=154, Unknown=35, NotChecked=350, Total=600
[2022-11-21 17:14:51,620 INFO  L413           NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time
[2022-11-21 17:14:51,621 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 53 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 1 Unknown, 39 Unchecked, 6.4s Time]
[2022-11-21 17:14:51,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2022-11-21 17:14:51,625 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15.
[2022-11-21 17:14:51,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 17:14:51,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-11-21 17:14:51,626 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12
[2022-11-21 17:14:51,627 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-21 17:14:51,627 INFO  L495      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-11-21 17:14:51,627 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-21 17:14:51,627 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-11-21 17:14:51,628 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-11-21 17:14:51,628 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-21 17:14:51,628 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-21 17:14:51,639 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-21 17:14:51,828 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-21 17:14:51,829 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-21 17:14:51,829 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-21 17:14:51,830 INFO  L85        PathProgramCache]: Analyzing trace with hash 2096200307, now seen corresponding path program 1 times
[2022-11-21 17:14:51,830 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-21 17:14:51,830 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618330678]
[2022-11-21 17:14:51,830 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 17:14:51,831 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-21 17:14:51,841 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-21 17:14:51,841 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666058650]
[2022-11-21 17:14:51,842 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-21 17:14:51,842 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-21 17:14:51,842 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3
[2022-11-21 17:14:51,843 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-21 17:14:51,847 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2e1764-701b-4cd8-8686-e31ac334ebd9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-21 17:14:51,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-21 17:14:51,898 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-11-21 17:14:51,900 INFO  L286         TraceCheckSpWp]: Computing forward predicates...