./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc --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 e401cb5a55548693b1ec0dc85ab970a5c443ca7f94bea25587ee110941770f7d --- 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-5e519f3 [2022-11-02 21:11:36,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:11:36,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:11:36,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:11:36,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:11:36,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:11:36,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:11:36,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:11:36,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:11:36,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:11:36,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:11:36,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:11:36,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:11:36,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:11:36,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:11:36,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:11:36,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:11:36,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:11:36,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:11:36,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:11:36,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:11:36,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:11:36,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:11:36,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:11:36,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:11:36,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:11:36,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:11:36,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:11:36,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:11:36,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:11:36,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:11:36,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:11:36,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:11:36,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:11:36,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:11:36,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:11:36,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:11:36,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:11:36,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:11:36,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:11:36,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:11:36,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:11:36,821 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:11:36,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:11:36,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:11:36,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:11:36,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:11:36,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:11:36,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:11:36,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:11:36,824 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:11:36,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:11:36,826 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:11:36,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:11:36,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:11:36,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:11:36,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:11:36,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:11:36,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:11:36,827 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:11:36,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:11:36,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:11:36,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:11:36,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:11:36,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:11:36,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:11:36,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:36,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:11:36,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:11:36,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:11:36,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:11:36,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:11:36,831 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:11:36,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:11:36,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:11:36,832 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_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401cb5a55548693b1ec0dc85ab970a5c443ca7f94bea25587ee110941770f7d [2022-11-02 21:11:37,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:11:37,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:11:37,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:11:37,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:11:37,194 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:11:37,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i [2022-11-02 21:11:37,275 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/data/58b8f6eb8/e18aeddc4763401ead9ad98430e90055/FLAGf2907969a [2022-11-02 21:11:37,726 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:11:37,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i [2022-11-02 21:11:37,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/data/58b8f6eb8/e18aeddc4763401ead9ad98430e90055/FLAGf2907969a [2022-11-02 21:11:38,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/data/58b8f6eb8/e18aeddc4763401ead9ad98430e90055 [2022-11-02 21:11:38,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:11:38,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:11:38,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:38,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:11:38,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:11:38,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71db3ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38, skipping insertion in model container [2022-11-02 21:11:38,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:11:38,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:11:38,349 WARN L230 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_02305e1b-ab3b-487c-90a3-c46b779161cc/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[1226,1239] [2022-11-02 21:11:38,374 WARN L230 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_02305e1b-ab3b-487c-90a3-c46b779161cc/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[2841,2854] [2022-11-02 21:11:38,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:38,384 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:11:38,394 WARN L230 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_02305e1b-ab3b-487c-90a3-c46b779161cc/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[1226,1239] [2022-11-02 21:11:38,405 WARN L230 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_02305e1b-ab3b-487c-90a3-c46b779161cc/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[2841,2854] [2022-11-02 21:11:38,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:38,418 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:11:38,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38 WrapperNode [2022-11-02 21:11:38,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:38,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:38,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:11:38,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:11:38,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,461 INFO L138 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-11-02 21:11:38,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:38,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:11:38,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:11:38,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:11:38,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:11:38,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:11:38,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:11:38,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:11:38,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (1/1) ... [2022-11-02 21:11:38,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:38,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:11:38,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:11:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:11:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-02 21:11:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-02 21:11:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-02 21:11:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-02 21:11:38,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:11:38,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:11:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:11:38,662 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:11:38,663 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:11:38,819 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:11:38,825 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:11:38,826 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:11:38,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:38 BoogieIcfgContainer [2022-11-02 21:11:38,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:11:38,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:11:38,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:11:38,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:11:38,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:11:38" (1/3) ... [2022-11-02 21:11:38,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6952b9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:38, skipping insertion in model container [2022-11-02 21:11:38,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:38" (2/3) ... [2022-11-02 21:11:38,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6952b9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:38, skipping insertion in model container [2022-11-02 21:11:38,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:38" (3/3) ... [2022-11-02 21:11:38,838 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_3.i [2022-11-02 21:11:38,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:11:38,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 21:11:38,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:11:38,920 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;@767959ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:11:38,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 21:11:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:11:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:11:38,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:38,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:38,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-02 21:11:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744395280] [2022-11-02 21:11:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:38,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744395280] [2022-11-02 21:11:39,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744395280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:39,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:39,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:11:39,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636836829] [2022-11-02 21:11:39,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:39,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:11:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:11:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:11:39,399 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-02 21:11:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:39,490 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-11-02 21:11:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:11:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 [2022-11-02 21:11:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:39,500 INFO L225 Difference]: With dead ends: 90 [2022-11-02 21:11:39,500 INFO L226 Difference]: Without dead ends: 36 [2022-11-02 21:11:39,503 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 [2022-11-02 21:11:39,507 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:39,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:11:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-02 21:11:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-11-02 21:11:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:11:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-02 21:11:39,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-11-02 21:11:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:39,575 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-02 21:11:39,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-02 21:11:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-02 21:11:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:11:39,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:39,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:11:39,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-11-02 21:11:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178489943] [2022-11-02 21:11:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:39,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178489943] [2022-11-02 21:11:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178489943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:39,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:11:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773269151] [2022-11-02 21:11:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:39,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:11:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:11:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:11:39,838 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-02 21:11:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:39,911 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-02 21:11:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:11:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 [2022-11-02 21:11:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:39,913 INFO L225 Difference]: With dead ends: 36 [2022-11-02 21:11:39,913 INFO L226 Difference]: Without dead ends: 30 [2022-11-02 21:11:39,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:11:39,921 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:39,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:11:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-02 21:11:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-02 21:11:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:11:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-02 21:11:39,935 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-02 21:11:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:39,936 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-02 21:11:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-02 21:11:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-02 21:11:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 21:11:39,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:39,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:39,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:11:39,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-11-02 21:11:39,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:39,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891216541] [2022-11-02 21:11:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:39,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:11:39,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756228929] [2022-11-02 21:11:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:39,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:39,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:39,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:11:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:11:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:58,930 WARN L234 SmtUtils]: Spent 15.42s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:12:18,912 WARN L234 SmtUtils]: Spent 10.83s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:12:41,502 WARN L234 SmtUtils]: Spent 11.04s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:13:06,568 WARN L234 SmtUtils]: Spent 9.35s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:13:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:13:07,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:13:30,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891216541] [2022-11-02 21:13:30,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:13:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756228929] [2022-11-02 21:13:30,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756228929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:30,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:13:30,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-02 21:13:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513914763] [2022-11-02 21:13:30,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:30,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:13:30,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:13:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=196, Unknown=22, NotChecked=0, Total=272 [2022-11-02 21:13:30,389 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-11-02 21:13:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:35,652 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-11-02 21:13:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:13:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 [2022-11-02 21:13:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:35,654 INFO L225 Difference]: With dead ends: 42 [2022-11-02 21:13:35,654 INFO L226 Difference]: Without dead ends: 33 [2022-11-02 21:13:35,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 111.5s TimeCoverageRelationStatistics Valid=74, Invalid=244, Unknown=24, NotChecked=0, Total=342 [2022-11-02 21:13:35,656 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:35,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-02 21:13:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-02 21:13:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-02 21:13:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:13:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-02 21:13:35,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-11-02 21:13:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:35,668 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-02 21:13:35,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-11-02 21:13:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-02 21:13:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:13:35,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:35,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:35,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:35,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2022-11-02 21:13:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083279888] [2022-11-02 21:13:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:35,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:13:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026752541] [2022-11-02 21:13:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:13:35,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:35,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:35,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:13:36,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:13:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:13:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:13:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:19,500 WARN L234 SmtUtils]: Spent 35.08s on a formula simplification. DAG size of input: 68 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:14:37,326 WARN L234 SmtUtils]: Spent 10.83s on a formula simplification. DAG size of input: 34 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:14:57,980 WARN L234 SmtUtils]: Spent 8.46s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:15:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:15:00,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:15:40,961 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse6 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (let ((.cse17 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (not .cse6)) (.cse2 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse0 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse1 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse0) 256))) (or (< 127 (mod .cse0 256)) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse0) 256) 127) (= .cse0 0) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse1) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)) (< .cse1 .cse2))))) .cse3) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse4 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod .cse4 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse4) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse5) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse4) 256) 127)) (not (<= .cse5 127)) (< .cse5 .cse2))))) .cse6) (or .cse3 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse7 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse7) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (not (<= .cse8 127)) (< .cse8 .cse2) (not (<= (mod .cse7 256) 127))))))) (or .cse3 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse9 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse10 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse9) 256))) (or (< 127 (mod .cse9 256)) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse10) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse9) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 0)) (< .cse10 .cse2)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse11 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse11) 256) 0)) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 127) (= .cse12 0) (not (<= .cse11 127)) (< .cse11 .cse2) (not (<= (mod .cse12 256) 127)))))) .cse3) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse13 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod .cse13 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse13) 256) 127)) (not (<= .cse14 127)) (< .cse14 .cse2)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse15 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse15) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse16) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse15) 256) 0)) (< .cse15 .cse2) (<= (mod .cse16 256) 127))))) .cse17) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (mod .cse19 256))) (or (< 127 .cse18) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse19) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse19) 256)) (< .cse18 .cse2))))) .cse6) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse21 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse21) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0)) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse21) 256) 127) (not (<= .cse20 127)) (< .cse20 .cse2) (<= (mod .cse21 256) 127))))) .cse3) (or .cse17 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse23 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse22) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse23) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0)) (< .cse23 .cse2) (<= (mod .cse22 256) 127)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse25 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod .cse25 256))) (or (< 127 .cse24) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse24) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse25) 256)) (< .cse24 .cse2)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse27 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse26) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse26) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0)) (not (<= .cse27 127)) (< .cse27 .cse2) (<= (mod .cse26 256) 127))))) .cse3) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod .cse28 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0)) (not (<= .cse29 127)) (< .cse29 .cse2)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse31 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (< 127 .cse30) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse31) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse30) 256) 0)) (< .cse30 .cse2)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse33 (mod .cse32 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0)) (not (<= .cse33 127)) (< .cse33 .cse2)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse35 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse34 (mod .cse35 256))) (or (< 127 .cse34) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse35) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse35) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0)) (< .cse34 .cse2))))))))) (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from true [2022-11-02 21:15:55,594 WARN L833 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (let ((.cse2 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse1 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 (mod .cse1 256))) (or (< 127 .cse0) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse1) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse1) 256)) (< .cse0 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse3 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse4 (mod .cse3 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse3) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse4) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse3) 256) 127)) (not (<= .cse4 127)) (< .cse4 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse6 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod .cse6 256))) (or (< 127 .cse5) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse6) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse5) 256) 0)) (< .cse5 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse7 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod .cse7 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse7) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (not (<= .cse8 127)) (< .cse8 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse10 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse9 (mod .cse10 256))) (or (< 127 .cse9) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse9) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse10) 256)) (< .cse9 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse11 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod .cse11 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse11) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse11) 256) 127)) (not (<= .cse12 127)) (< .cse12 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse13 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod .cse13 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse13) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0)) (not (<= .cse14 127)) (< .cse14 .cse2))))) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse15 (mod .cse16 256))) (or (< 127 .cse15) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse16) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse16) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse15) 256) 0)) (< .cse15 .cse2)))))))) is different from false [2022-11-02 21:15:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-02 21:15:59,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:15:59,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083279888] [2022-11-02 21:15:59,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:15:59,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026752541] [2022-11-02 21:15:59,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026752541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:15:59,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:15:59,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-02 21:15:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404631032] [2022-11-02 21:15:59,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:15:59,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:15:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:15:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:15:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=163, Unknown=6, NotChecked=54, Total=272 [2022-11-02 21:15:59,578 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-11-02 21:16:02,911 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (let ((.cse0 (not .cse6))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) .cse0 (or (let ((.cse17 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse1 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse2 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse1) 256))) (or (< 127 (mod .cse1 256)) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse1) 256) 127) (= .cse1 0) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse2) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse2) 256) 0)) (< .cse2 .cse3))))) .cse0) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse4 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod .cse4 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse4) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse5) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse4) 256) 127)) (not (<= .cse5 127)) (< .cse5 .cse3))))) .cse6) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse7 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse7) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse7) 256) 127)) (= |ULTIMATE.start_gcd_test_~b#1| 0) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (not (<= .cse8 127)) (< .cse8 .cse3) (not (<= (mod .cse7 256) 127))))))) (or .cse0 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse9 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse10 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse9) 256))) (or (< 127 (mod .cse9 256)) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse10) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse9) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 0)) (< .cse10 .cse3)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse11 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse11) 256) 0)) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 127) (= .cse12 0) (not (<= .cse11 127)) (< .cse11 .cse3) (not (<= (mod .cse12 256) 127)))))) .cse0) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse13 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod .cse13 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0)) (not (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse13) 256) 127)) (not (<= .cse14 127)) (< .cse14 .cse3)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse15 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse15) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse16) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse15) 256) 0)) (< .cse15 .cse3) (<= (mod .cse16 256) 127))))) .cse17) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (mod .cse19 256))) (or (< 127 .cse18) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse19) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse19) 256)) (< .cse18 .cse3))))) .cse6) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse21 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse21) 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0)) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse21) 256) 127) (not (<= .cse20 127)) (< .cse20 .cse3) (<= (mod .cse21 256) 127))))) .cse0) (or .cse17 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse23 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse22) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 .cse23) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0)) (< .cse23 .cse3) (<= (mod .cse22 256) 127)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse25 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod .cse25 256))) (or (< 127 .cse24) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse24) 256) 0)) (< 127 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse25) 256)) (< .cse24 .cse3)))))) (or (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse27 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse26) 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse26) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0)) (not (<= .cse27 127)) (< .cse27 .cse3) (<= (mod .cse26 256) 127))))) .cse0) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod .cse28 256))) (or (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0)) (not (<= .cse29 127)) (< .cse29 .cse3)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse31 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (< 127 .cse30) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse31) 256) 127) (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse30) 256) 0)) (< .cse30 .cse3)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse33 (mod .cse32 256))) (or (not (<= (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 127)) (< |ULTIMATE.start_gcd_test_~b#1| 0) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256) 127) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0)) (not (<= .cse33 127)) (< .cse33 .cse3)))))) (or .cse6 (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse35 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse34 (mod .cse35 256))) (or (< 127 .cse34) (<= (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse35) 256) 127) (<= 0 |ULTIMATE.start_gcd_test_~b#1|) (< 127 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse35) 256)) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0)) (< .cse34 .cse3)))))))) (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)))))) is different from true [2022-11-02 21:16:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:16:02,934 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-02 21:16:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:16:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 13 [2022-11-02 21:16:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:16:02,936 INFO L225 Difference]: With dead ends: 44 [2022-11-02 21:16:02,936 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 21:16:02,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=51, Invalid=164, Unknown=7, NotChecked=84, Total=306 [2022-11-02 21:16:02,938 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:16:02,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 210 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-11-02 21:16:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 21:16:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-02 21:16:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:16:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-02 21:16:02,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2022-11-02 21:16:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:16:02,952 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-02 21:16:02,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-11-02 21:16:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-02 21:16:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:16:02,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:16:02,954 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:16:02,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:16:03,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:16:03,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:16:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:16:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2052984139, now seen corresponding path program 1 times [2022-11-02 21:16:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:16:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576237961] [2022-11-02 21:16:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:16:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:16:03,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:16:03,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403134979] [2022-11-02 21:16:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:16:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:16:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:16:03,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:16:03,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02305e1b-ab3b-487c-90a3-c46b779161cc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:16:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:16:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:16:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:16:13,170 WARN L234 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)