./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW --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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- 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-4e7fbc6 [2022-11-23 15:07:02,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:07:02,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:07:02,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:07:02,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:07:02,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:07:02,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:07:02,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:07:02,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:07:02,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:07:02,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:07:02,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:07:02,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:07:02,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:07:02,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:07:02,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:07:02,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:07:02,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:07:02,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:07:02,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:07:02,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:07:02,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:07:02,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:07:02,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:07:02,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:07:02,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:07:02,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:07:02,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:07:02,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:07:02,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:07:02,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:07:02,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:07:02,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:07:02,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:07:02,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:07:02,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:07:02,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:07:02,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:07:02,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:07:02,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:07:02,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:07:02,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:07:02,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:07:02,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:07:02,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:07:02,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:07:02,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:07:02,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:07:02,995 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:07:02,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:07:02,995 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:07:02,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:07:02,995 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:07:02,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:07:02,996 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:07:02,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:07:02,996 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:07:02,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:07:02,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:07:02,997 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:07:02,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:07:02,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:07:02,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:07:02,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:07:02,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:07:02,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:07:02,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:07:02,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:07:03,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:07:03,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:07:03,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:07:03,000 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:07:03,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:07:03,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:07:03,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:07:03,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:07:03,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:07:03,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:07:03,001 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_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2022-11-23 15:07:03,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:07:03,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:07:03,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:07:03,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:07:03,363 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:07:03,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-23 15:07:06,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:07:06,609 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:07:06,610 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-23 15:07:06,617 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/data/dade6e4aa/c796bb546b1b414ea3a71130ce52b153/FLAG2f39fa9fe [2022-11-23 15:07:06,637 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/data/dade6e4aa/c796bb546b1b414ea3a71130ce52b153 [2022-11-23 15:07:06,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:07:06,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:07:06,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:07:06,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:07:06,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:07:06,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:06,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d45343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06, skipping insertion in model container [2022-11-23 15:07:06,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:06,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:07:06,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:07:06,867 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-23 15:07:06,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:07:06,909 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:07:06,925 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-23 15:07:06,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:07:06,950 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:07:06,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06 WrapperNode [2022-11-23 15:07:06,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:07:06,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:07:06,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:07:06,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:07:06,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:06,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,038 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-11-23 15:07:07,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:07:07,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:07:07,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:07:07,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:07:07,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:07:07,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:07:07,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:07:07,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:07:07,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (1/1) ... [2022-11-23 15:07:07,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:07:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:07,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:07:07,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:07:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:07:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:07:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:07:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:07:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:07:07,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:07:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:07:07,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:07:07,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:07:07,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:07:07,452 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:07:07,520 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:07:07,520 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-23 15:07:07,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:07 BoogieIcfgContainer [2022-11-23 15:07:07,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:07:07,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:07:07,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:07:07,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:07:07,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:07:06" (1/3) ... [2022-11-23 15:07:07,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691549c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:07, skipping insertion in model container [2022-11-23 15:07:07,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:06" (2/3) ... [2022-11-23 15:07:07,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691549c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:07, skipping insertion in model container [2022-11-23 15:07:07,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:07" (3/3) ... [2022-11-23 15:07:07,533 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2022-11-23 15:07:07,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:07:07,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:07:07,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:07:07,639 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;@34bede8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:07:07,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:07:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:07:07,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:07,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:07,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2022-11-23 15:07:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931148431] [2022-11-23 15:07:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:07,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593272724] [2022-11-23 15:07:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:07,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:07,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:07,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:07:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:07,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:07:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:08,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:07:08,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931148431] [2022-11-23 15:07:08,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593272724] [2022-11-23 15:07:08,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593272724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:08,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:08,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:07:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327552508] [2022-11-23 15:07:08,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:08,067 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:08,130 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-11-23 15:07:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:07:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:08,141 INFO L225 Difference]: With dead ends: 27 [2022-11-23 15:07:08,142 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 15:07:08,145 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 [2022-11-23 15:07:08,148 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:08,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:07:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 15:07:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-23 15:07:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-23 15:07:08,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-11-23 15:07:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:08,184 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-23 15:07:08,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-23 15:07:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:07:08,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:08,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:08,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:07:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:08,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2022-11-23 15:07:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871076195] [2022-11-23 15:07:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:08,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:08,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121658038] [2022-11-23 15:07:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:08,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:08,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:08,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:07:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:07:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:08,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:07:08,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871076195] [2022-11-23 15:07:08,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121658038] [2022-11-23 15:07:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121658038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:08,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:08,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184609880] [2022-11-23 15:07:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:08,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:07:08,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:07:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:07:08,552 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:08,650 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2022-11-23 15:07:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:07:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 15:07:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:08,653 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:07:08,654 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 15:07:08,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:07:08,659 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:08,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 15:07:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-11-23 15:07:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-11-23 15:07:08,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2022-11-23 15:07:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:08,676 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-11-23 15:07:08,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-11-23 15:07:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:07:08,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:08,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:08,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:08,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:08,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2022-11-23 15:07:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:08,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987711666] [2022-11-23 15:07:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:08,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390322430] [2022-11-23 15:07:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:08,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:08,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:08,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:07:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:07:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:09,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:09,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987711666] [2022-11-23 15:07:09,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390322430] [2022-11-23 15:07:09,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390322430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914544720] [2022-11-23 15:07:09,074 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:07:09,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:09,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:09,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:09,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:09,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,343 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-23 15:07:09,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-23 15:07:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,578 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:07:09,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:07:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:09,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-23 15:07:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:10,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:10,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:10,432 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-23 15:07:10,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-23 15:07:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:10,691 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:10,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:10,767 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:10,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:11,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:11,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [914544720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:11,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:11,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-23 15:07:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616519367] [2022-11-23 15:07:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:07:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:07:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:07:11,777 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:12,462 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-23 15:07:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:07:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:07:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:12,463 INFO L225 Difference]: With dead ends: 39 [2022-11-23 15:07:12,463 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:07:12,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:07:12,465 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:12,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:07:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:07:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-23 15:07:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-11-23 15:07:12,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2022-11-23 15:07:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:12,486 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-11-23 15:07:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-11-23 15:07:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:07:12,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:12,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:12,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:12,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2022-11-23 15:07:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:12,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136314223] [2022-11-23 15:07:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:12,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:12,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634973872] [2022-11-23 15:07:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:12,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:12,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:12,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:07:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:07:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:07:12,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:07:12,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136314223] [2022-11-23 15:07:12,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634973872] [2022-11-23 15:07:12,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634973872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548157771] [2022-11-23 15:07:12,858 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 15:07:12,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:12,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:12,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:12,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,033 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:07:13,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:07:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-23 15:07:13,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-23 15:07:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:13,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:13,558 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-23 15:07:13,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-23 15:07:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:13,732 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:13,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:13,787 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:13,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:13,986 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:07:13,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:07:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,035 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,084 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,157 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:07:14,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:07:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,198 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,244 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:07:14,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:07:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,298 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,344 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,416 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:14,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:14,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,559 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:14,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,715 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:14,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,829 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:14,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:14,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:14,966 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:14,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:14,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:15,011 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:15,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:15,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:15,076 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:15,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:16,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '518#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:16,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:16,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:16,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 15:07:16,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872453173] [2022-11-23 15:07:16,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:07:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:07:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:07:16,347 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:16,514 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-11-23 15:07:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:07:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 15:07:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:16,517 INFO L225 Difference]: With dead ends: 63 [2022-11-23 15:07:16,517 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 15:07:16,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:07:16,521 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:16,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 16 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 15:07:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-11-23 15:07:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-23 15:07:16,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2022-11-23 15:07:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:16,555 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-23 15:07:16,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-23 15:07:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:07:16,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:16,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:16,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:07:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:16,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2022-11-23 15:07:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951272433] [2022-11-23 15:07:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:16,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669602761] [2022-11-23 15:07:16,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:07:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:16,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:16,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:07:16,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:07:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:07:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:07:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:07:16,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:07:16,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951272433] [2022-11-23 15:07:16,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669602761] [2022-11-23 15:07:16,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669602761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:16,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737027678] [2022-11-23 15:07:17,004 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 15:07:17,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:17,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:17,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:17,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,155 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:07:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:07:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-23 15:07:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-23 15:07:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:17,626 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-23 15:07:17,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-23 15:07:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:17,792 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:17,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:17,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:17,851 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:17,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,024 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:07:18,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:07:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,067 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,111 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,184 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,230 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,285 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,325 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,374 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,425 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:18,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:18,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,515 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-23 15:07:18,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 58 [2022-11-23 15:07:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,642 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:18,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:18,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,772 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:18,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:18,903 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:07:18,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:07:19,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:19,029 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:07:19,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:07:19,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:19,073 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:19,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:19,122 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:07:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:07:19,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:22,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:22,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:22,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:22,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-23 15:07:22,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407245786] [2022-11-23 15:07:22,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:22,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:07:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:07:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:07:22,393 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:22,586 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-11-23 15:07:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:07:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 15:07:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:22,589 INFO L225 Difference]: With dead ends: 171 [2022-11-23 15:07:22,590 INFO L226 Difference]: Without dead ends: 141 [2022-11-23 15:07:22,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:07:22,591 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 122 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:22,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 16 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-23 15:07:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2022-11-23 15:07:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-11-23 15:07:22,633 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2022-11-23 15:07:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:22,633 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-11-23 15:07:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-11-23 15:07:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 15:07:22,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:22,636 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:22,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:22,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2022-11-23 15:07:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083637937] [2022-11-23 15:07:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:22,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997437296] [2022-11-23 15:07:22,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:07:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:22,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:22,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:13:59,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:13:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:13:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:13:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-23 15:14:00,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-23 15:14:00,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083637937] [2022-11-23 15:14:00,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:14:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997437296] [2022-11-23 15:14:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997437296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009407185] [2022-11-23 15:14:00,140 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 15:14:00,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:00,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:00,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:00,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,277 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:14:00,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:14:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-23 15:14:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-23 15:14:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:00,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:00,766 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-23 15:14:00,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-23 15:14:00,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:00,911 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:00,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:00,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:00,959 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:00,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,131 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:01,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:01,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,172 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,230 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,298 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:01,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,335 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,378 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,426 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,504 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:01,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:01,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,579 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-23 15:14:01,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 58 [2022-11-23 15:14:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,712 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:01,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:01,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,851 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:01,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:01,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:01,967 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:01,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:02,081 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:02,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:02,138 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:02,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:02,185 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:02,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:02,192 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:03,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1851#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:14:03,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:03,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:14:03,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-23 15:14:03,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262098397] [2022-11-23 15:14:03,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:03,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:14:03,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:14:03,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:14:03,755 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:04,112 INFO L93 Difference]: Finished difference Result 286 states and 398 transitions. [2022-11-23 15:14:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:14:04,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-23 15:14:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:04,114 INFO L225 Difference]: With dead ends: 286 [2022-11-23 15:14:04,114 INFO L226 Difference]: Without dead ends: 201 [2022-11-23 15:14:04,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 26 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:14:04,116 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 186 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:04,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-23 15:14:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 182. [2022-11-23 15:14:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.143646408839779) internal successors, (207), 181 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2022-11-23 15:14:04,177 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 80 [2022-11-23 15:14:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:04,178 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2022-11-23 15:14:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2022-11-23 15:14:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 15:14:04,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:04,180 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:04,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:14:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:14:04,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1816079575, now seen corresponding path program 4 times [2022-11-23 15:14:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899320503] [2022-11-23 15:14:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:04,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:14:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180645620] [2022-11-23 15:14:04,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:14:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:04,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:04,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:14:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:14:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-23 15:14:05,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-23 15:14:05,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899320503] [2022-11-23 15:14:05,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:14:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180645620] [2022-11-23 15:14:05,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180645620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:05,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545034081] [2022-11-23 15:14:05,450 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 15:14:05,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:05,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:05,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:05,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,597 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:14:05,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:14:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-23 15:14:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-23 15:14:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:14:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,000 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-23 15:14:06,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-23 15:14:06,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,132 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,177 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,360 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:06,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,404 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,454 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,525 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:06,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:06,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,571 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,611 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:06,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,655 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,697 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:06,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:06,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,790 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:06,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:06,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,898 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:06,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:06,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:06,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,015 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:07,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:07,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,135 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 15:14:07,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-23 15:14:07,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,258 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:14:07,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-23 15:14:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,296 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:07,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:14:07,339 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-23 15:14:07,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-23 15:14:07,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:11,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3685#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-23 15:14:11,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:11,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:14:11,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-23 15:14:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297436813] [2022-11-23 15:14:11,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:11,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:14:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:14:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:14:11,735 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:12,525 INFO L93 Difference]: Finished difference Result 574 states and 770 transitions. [2022-11-23 15:14:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 15:14:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-23 15:14:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:12,528 INFO L225 Difference]: With dead ends: 574 [2022-11-23 15:14:12,528 INFO L226 Difference]: Without dead ends: 405 [2022-11-23 15:14:12,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 374 SyntacticMatches, 50 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 15:14:12,530 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 420 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:12,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 70 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:14:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-23 15:14:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 362. [2022-11-23 15:14:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.105263157894737) internal successors, (399), 361 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 399 transitions. [2022-11-23 15:14:12,627 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 399 transitions. Word has length 152 [2022-11-23 15:14:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:12,628 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 399 transitions. [2022-11-23 15:14:12,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:14:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 399 transitions. [2022-11-23 15:14:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-23 15:14:12,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:12,632 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:12,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:12,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1993710377, now seen corresponding path program 5 times [2022-11-23 15:14:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086870915] [2022-11-23 15:14:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:13,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:14:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998821987] [2022-11-23 15:14:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:14:13,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:13,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4cb69e-d926-4406-bbf9-a0ee51cbef10/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process