./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:22:55,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:22:55,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:22:55,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:22:55,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:22:55,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:22:55,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:22:55,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:22:55,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:22:55,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:22:55,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:22:55,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:22:55,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:22:55,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:22:55,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:22:55,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:22:55,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:22:55,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:22:55,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:22:55,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:22:55,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:22:55,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:22:55,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:22:55,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:22:55,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:22:55,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:22:55,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:22:55,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:22:55,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:22:55,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:22:55,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:22:55,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:22:55,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:22:55,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:22:55,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:22:55,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:22:55,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:22:55,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:22:55,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:22:55,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:22:55,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:22:55,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:22:55,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:22:55,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:22:55,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:22:55,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:22:55,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:22:55,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:22:55,857 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:22:55,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:22:55,858 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:22:55,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:22:55,859 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:22:55,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:22:55,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:22:55,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:22:55,860 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:22:55,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:22:55,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:22:55,861 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:22:55,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:22:55,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:22:55,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:22:55,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:22:55,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:22:55,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:22:55,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:22:55,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:22:55,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:22:55,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:22:55,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:22:55,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:22:55,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:22:55,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:22:55,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:55,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:22:55,866 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:22:55,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:22:55,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:22:55,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:22:55,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:22:55,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:22:55,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:22:55,868 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_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef [2022-11-16 20:22:56,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:22:56,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:22:56,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:22:56,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:22:56,221 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:22:56,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/bitvector/gcd_4.c [2022-11-16 20:22:56,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/data/c2873cc48/302a493f0cb14eb38ef2cc7b1bfbf0b1/FLAG257542136 [2022-11-16 20:22:56,793 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:22:56,795 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/sv-benchmarks/c/bitvector/gcd_4.c [2022-11-16 20:22:56,802 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/data/c2873cc48/302a493f0cb14eb38ef2cc7b1bfbf0b1/FLAG257542136 [2022-11-16 20:22:57,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/data/c2873cc48/302a493f0cb14eb38ef2cc7b1bfbf0b1 [2022-11-16 20:22:57,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:22:57,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:22:57,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:57,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:22:57,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:22:57,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97b3e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57, skipping insertion in model container [2022-11-16 20:22:57,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:22:57,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:22:57,450 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2022-11-16 20:22:57,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:57,483 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:22:57,498 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2022-11-16 20:22:57,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:57,518 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:22:57,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57 WrapperNode [2022-11-16 20:22:57,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:57,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:57,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:22:57,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:22:57,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,561 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-11-16 20:22:57,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:57,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:22:57,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:22:57,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:22:57,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,602 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:22:57,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:22:57,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:22:57,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:22:57,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (1/1) ... [2022-11-16 20:22:57,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:57,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:57,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:22:57,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:22:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:22:57,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:22:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:22:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:22:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:22:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:22:57,761 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:22:57,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:22:57,911 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:22:57,991 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:22:57,992 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:22:57,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:57 BoogieIcfgContainer [2022-11-16 20:22:57,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:22:57,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:22:57,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:22:58,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:22:58,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:22:57" (1/3) ... [2022-11-16 20:22:58,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d60fecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:58, skipping insertion in model container [2022-11-16 20:22:58,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:57" (2/3) ... [2022-11-16 20:22:58,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d60fecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:58, skipping insertion in model container [2022-11-16 20:22:58,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:57" (3/3) ... [2022-11-16 20:22:58,003 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2022-11-16 20:22:58,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:22:58,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:22:58,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:22:58,079 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@ea2e0bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:22:58,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:22:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:22:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:22:58,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:58,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:58,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 111551512, now seen corresponding path program 1 times [2022-11-16 20:22:58,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:58,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750295227] [2022-11-16 20:22:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:58,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:58,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061157285] [2022-11-16 20:22:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:58,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:58,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:22:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:22:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:58,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:22:58,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750295227] [2022-11-16 20:22:58,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061157285] [2022-11-16 20:22:58,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061157285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:58,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:58,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:22:58,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961236886] [2022-11-16 20:22:58,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:58,488 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:58,552 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2022-11-16 20:22:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:58,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 20:22:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:58,563 INFO L225 Difference]: With dead ends: 34 [2022-11-16 20:22:58,564 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 20:22:58,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:58,573 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:58,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:22:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 20:22:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-16 20:22:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-16 20:22:58,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-16 20:22:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:58,641 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-16 20:22:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-16 20:22:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:22:58,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:58,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:58,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 20:22:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:22:58,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1751160227, now seen corresponding path program 1 times [2022-11-16 20:22:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:58,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257558150] [2022-11-16 20:22:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:58,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:58,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257558150] [2022-11-16 20:22:58,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 20:22:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958601834] [2022-11-16 20:22:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:58,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:58,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:22:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:22:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:59,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:22:59,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958601834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:59,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:22:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435327419] [2022-11-16 20:22:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:59,099 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:59,120 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-16 20:22:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 20:22:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:59,123 INFO L225 Difference]: With dead ends: 24 [2022-11-16 20:22:59,123 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 20:22:59,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:59,125 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:59,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:22:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 20:22:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 20:22:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-16 20:22:59,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-16 20:22:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:59,137 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-16 20:22:59,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-16 20:22:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:22:59,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:59,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:59,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:59,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:59,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1480537094, now seen corresponding path program 1 times [2022-11-16 20:22:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45121292] [2022-11-16 20:22:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:59,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:59,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160692825] [2022-11-16 20:22:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:59,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:22:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:59,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:22:59,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:59,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:59,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:59,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45121292] [2022-11-16 20:22:59,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:59,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160692825] [2022-11-16 20:22:59,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160692825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403122866] [2022-11-16 20:22:59,611 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:22:59,612 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:22:59,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:22:59,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:22:59,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:23:00,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-16 20:23:00,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:23:00,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:23:00,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:23:00,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-16 20:23:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051021629] [2022-11-16 20:23:00,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:23:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:23:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:23:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:23:00,526 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:00,585 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-16 20:23:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:23:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:23:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:00,586 INFO L225 Difference]: With dead ends: 26 [2022-11-16 20:23:00,586 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 20:23:00,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:23:00,589 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:00,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:23:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 20:23:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 20:23:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:23:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-16 20:23:00,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-11-16 20:23:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:00,596 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-16 20:23:00,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-16 20:23:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:23:00,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:00,598 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:00,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:00,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1016290586, now seen corresponding path program 2 times [2022-11-16 20:23:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:00,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984526967] [2022-11-16 20:23:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:00,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:23:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956534428] [2022-11-16 20:23:00,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:23:00,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:00,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:00,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:23:00,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:23:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:23:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:23:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:23:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:23:01,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984526967] [2022-11-16 20:23:01,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:23:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956534428] [2022-11-16 20:23:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956534428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:23:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408917839] [2022-11-16 20:23:01,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:23:01,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:23:01,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:23:01,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:23:01,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:23:01,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-16 20:23:01,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:23:01,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:23:01,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:23:01,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:01,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 20:23:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201587601] [2022-11-16 20:23:01,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:23:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 20:23:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 20:23:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:23:01,868 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:01,968 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-16 20:23:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:23:01,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 20:23:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:01,970 INFO L225 Difference]: With dead ends: 27 [2022-11-16 20:23:01,970 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 20:23:01,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:23:01,972 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:01,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:23:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 20:23:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 20:23:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:23:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-16 20:23:01,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-11-16 20:23:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:01,980 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-16 20:23:01,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-16 20:23:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:23:01,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:01,981 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:01,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:02,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:02,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1508307811, now seen corresponding path program 3 times [2022-11-16 20:23:02,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:02,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583245977] [2022-11-16 20:23:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:02,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:02,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:23:02,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451787146] [2022-11-16 20:23:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:23:02,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:02,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:02,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:23:02,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:23:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:23:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:23:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:23:02,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:23:02,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583245977] [2022-11-16 20:23:02,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:23:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451787146] [2022-11-16 20:23:02,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451787146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:23:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803942655] [2022-11-16 20:23:02,690 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:23:02,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:23:02,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:23:02,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:23:02,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:23:02,871 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-16 20:23:02,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:23:03,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:23:03,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:23:03,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:03,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 20:23:03,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632642164] [2022-11-16 20:23:03,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:23:03,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:23:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:23:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:23:03,310 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:03,800 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-16 20:23:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:23:03,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:23:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:03,801 INFO L225 Difference]: With dead ends: 32 [2022-11-16 20:23:03,802 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 20:23:03,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-16 20:23:03,803 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:03,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 20:23:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-16 20:23:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:23:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-16 20:23:03,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2022-11-16 20:23:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:03,815 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-16 20:23:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-16 20:23:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:23:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:03,816 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:03,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:04,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:04,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash -419027398, now seen corresponding path program 4 times [2022-11-16 20:23:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:04,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798390272] [2022-11-16 20:23:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:04,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:23:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384650265] [2022-11-16 20:23:04,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:23:04,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:04,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:04,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:23:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 20:23:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:23:04,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:16,965 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:24:21,730 WARN L233 SmtUtils]: Spent 53.30s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:30:43,301 WARN L233 SmtUtils]: Spent 5.46m on a formula simplification. DAG size of input: 139 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:32:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:18,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798390272] [2022-11-16 20:32:18,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:32:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384650265] [2022-11-16 20:32:18,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384650265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:32:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1869544501] [2022-11-16 20:32:18,075 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:32:18,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:32:18,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:32:18,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:32:18,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:32:18,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-16 20:32:18,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:32:26,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '746#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:32:26,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:32:26,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:32:26,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 20:32:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724922021] [2022-11-16 20:32:26,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:32:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:32:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:26,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:32:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=687, Unknown=6, NotChecked=0, Total=812 [2022-11-16 20:32:26,114 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:28,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:30,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:32,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:33,223 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-16 20:32:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:32:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:32:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:33,224 INFO L225 Difference]: With dead ends: 36 [2022-11-16 20:32:33,225 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 20:32:33,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 415.7s TimeCoverageRelationStatistics Valid=150, Invalid=836, Unknown=6, NotChecked=0, Total=992 [2022-11-16 20:32:33,226 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 33 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:33,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 172 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2022-11-16 20:32:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 20:32:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 20:32:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:32:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2022-11-16 20:32:33,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 13 [2022-11-16 20:32:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:33,235 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2022-11-16 20:32:33,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:32:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2022-11-16 20:32:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 20:32:33,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:33,236 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:32:33,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:32:33,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:32:33,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:32:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -598996777, now seen corresponding path program 1 times [2022-11-16 20:32:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655556402] [2022-11-16 20:32:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:33,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:32:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317857880] [2022-11-16 20:32:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:33,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:32:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:32:33,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:32:33,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c07fbd-0be5-4a2f-bec2-ebd01efa6b05/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:32:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 20:32:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:32:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:33,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:32:44,149 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse3 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (let ((.cse0 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse0)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (let ((.cse1 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse1) 0)) (not (= (* |c_ULTIMATE.start_gcd_test_~b#1| 2) .cse0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse1) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))))) .cse3) (or (let ((.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse4 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse4) 0) (not (= .cse5 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse4) 0)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= .cse5 |c_ULTIMATE.start_gcd_test_~a#1|)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (not .cse3)))) is different from false [2022-11-16 20:33:29,258 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse4 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse8 (not .cse12))) (and (or (and (let ((.cse0 (+ .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse0) 0) (not (= .cse1 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse0) 0)))) (let ((.cse5 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse5) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse5) 0)) (not (= .cse6 .cse2))))) .cse8) (or (and (let ((.cse9 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse9) 0)) (not (= .cse10 .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse9) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse12) (or (let ((.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse13 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse13) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse13) 0) (not (= .cse14 .cse11)))) (let ((.cse15 (+ .cse16 .cse7))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse15) 0)) (not (= .cse14 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse15) 0))))) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (or (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse17 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)) (not (= .cse1 .cse16))))) .cse8)))) is different from false [2022-11-16 20:33:31,261 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse4 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse8 (not .cse12))) (and (or (and (let ((.cse0 (+ .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse0) 0) (not (= .cse1 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse0) 0)))) (let ((.cse5 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse5) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse5) 0)) (not (= .cse6 .cse2))))) .cse8) (or (and (let ((.cse9 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse9) 0)) (not (= .cse10 .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse9) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse12) (or (let ((.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse13 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse13) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse13) 0) (not (= .cse14 .cse11)))) (let ((.cse15 (+ .cse16 .cse7))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse15) 0)) (not (= .cse14 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse15) 0))))) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (or (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse17 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)) (not (= .cse1 .cse16))))) .cse8)))) is different from true [2022-11-16 20:36:47,181 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse21 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse9 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse11 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse2 (+ .cse5 .cse6))) (or (= 0 (mod |c_ULTIMATE.start_main_~y~0#1| .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse2) 0)) (not (= .cse3 .cse4)))) (let ((.cse7 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse7) 0) (not (= .cse1 .cse8)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse7) 0)))) (let ((.cse12 (+ .cse5 .cse13))) (or (not (= .cse10 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse12) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse12) 0))) (let ((.cse14 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse14) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse14) 0)) (not (= .cse15 .cse11)))) (let ((.cse17 (+ .cse16 .cse15))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= .cse3 .cse10)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)))) (let ((.cse18 (+ .cse19 .cse6))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse18) 0) (not (= .cse8 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse18) 0)))) (let ((.cse20 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21))) (or (not (= .cse4 .cse11)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse20) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse20) 0))))))) (or (let ((.cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse28 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse24 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse26 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse23 (* |c_ULTIMATE.start_gcd_test_~a#1| 8))) (and (or (and (let ((.cse22 (+ .cse24 .cse19))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse22) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse22) 0) (not (= .cse1 .cse23)))) (let ((.cse25 (+ .cse15 .cse9))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse25) 0)) (not (= .cse26 .cse27)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse25) 0)))) .cse28) (or (and (let ((.cse29 (+ .cse21 .cse4))) (or (not (= .cse26 .cse1)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse29) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse29) 0))) (let ((.cse30 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse30) 0)) (not (= .cse27 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse30) 0)))) .cse28) (let ((.cse31 (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse26 .cse19)) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse31) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse31) 0)))) (or (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4)) (and (let ((.cse32 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse32) 0)) (not (= .cse26 .cse5)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse32) 0))) (let ((.cse33 (+ .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse33) 0) (not (= .cse5 .cse23)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse33) 0)))))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse0))) is different from false [2022-11-16 20:36:49,186 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse21 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse9 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse11 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse2 (+ .cse5 .cse6))) (or (= 0 (mod |c_ULTIMATE.start_main_~y~0#1| .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse2) 0)) (not (= .cse3 .cse4)))) (let ((.cse7 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse7) 0) (not (= .cse1 .cse8)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse7) 0)))) (let ((.cse12 (+ .cse5 .cse13))) (or (not (= .cse10 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse12) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse12) 0))) (let ((.cse14 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse14) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse14) 0)) (not (= .cse15 .cse11)))) (let ((.cse17 (+ .cse16 .cse15))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= .cse3 .cse10)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)))) (let ((.cse18 (+ .cse19 .cse6))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse18) 0) (not (= .cse8 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse18) 0)))) (let ((.cse20 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21))) (or (not (= .cse4 .cse11)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse20) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse20) 0))))))) (or (let ((.cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse28 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse24 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse26 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse23 (* |c_ULTIMATE.start_gcd_test_~a#1| 8))) (and (or (and (let ((.cse22 (+ .cse24 .cse19))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse22) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse22) 0) (not (= .cse1 .cse23)))) (let ((.cse25 (+ .cse15 .cse9))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse25) 0)) (not (= .cse26 .cse27)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse25) 0)))) .cse28) (or (and (let ((.cse29 (+ .cse21 .cse4))) (or (not (= .cse26 .cse1)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse29) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse29) 0))) (let ((.cse30 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse30) 0)) (not (= .cse27 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse30) 0)))) .cse28) (let ((.cse31 (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse26 .cse19)) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse31) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse31) 0)))) (or (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4)) (and (let ((.cse32 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse32) 0)) (not (= .cse26 .cse5)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse32) 0))) (let ((.cse33 (+ .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse33) 0) (not (= .cse5 .cse23)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse33) 0)))))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse0))) is different from true