./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/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_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/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_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- 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 15:54:47,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:54:47,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:54:47,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:54:47,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:54:47,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:54:47,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:54:47,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:54:47,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:54:47,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:54:47,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:54:47,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:54:47,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:54:47,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:54:47,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:54:47,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:54:47,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:54:47,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:54:47,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:54:47,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:54:47,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:54:47,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:54:47,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:54:47,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:54:47,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:54:47,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:54:47,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:54:47,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:54:47,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:54:47,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:54:47,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:54:47,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:54:47,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:54:47,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:54:47,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:54:47,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:54:47,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:54:47,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:54:47,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:54:47,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:54:47,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:54:47,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:54:47,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:54:47,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:54:47,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:54:47,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:54:47,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:54:47,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:54:47,279 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:54:47,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:54:47,280 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:54:47,280 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:54:47,281 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:54:47,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:54:47,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:54:47,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:54:47,282 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:54:47,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:54:47,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:54:47,283 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:54:47,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:54:47,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:54:47,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:54:47,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:54:47,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:54:47,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:54:47,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:54:47,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:54:47,285 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:54:47,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:54:47,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:54:47,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:54:47,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:54:47,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:54:47,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:47,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:54:47,288 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:54:47,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:54:47,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:54:47,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:54:47,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:54:47,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:54:47,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:54:47,290 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_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-11-23 15:54:47,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:54:47,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:54:47,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:54:47,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:54:47,596 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:54:47,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-23 15:54:50,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:54:50,726 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:54:50,727 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-23 15:54:50,733 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/data/ef9abb964/ec3828dd112a40538197ca66fd6f81e9/FLAGd15c21231 [2022-11-23 15:54:50,748 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/data/ef9abb964/ec3828dd112a40538197ca66fd6f81e9 [2022-11-23 15:54:50,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:54:50,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:54:50,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:50,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:54:50,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:54:50,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:50" (1/1) ... [2022-11-23 15:54:50,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7cfd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:50, skipping insertion in model container [2022-11-23 15:54:50,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:50" (1/1) ... [2022-11-23 15:54:50,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:54:50,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:54:50,989 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_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-23 15:54:51,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:51,040 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:54:51,055 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_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-23 15:54:51,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:51,096 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:54:51,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51 WrapperNode [2022-11-23 15:54:51,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:51,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:51,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:54:51,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:54:51,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,131 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-23 15:54:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:51,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:54:51,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:54:51,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:54:51,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:54:51,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:54:51,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:54:51,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:54:51,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:51,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:51,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:54:51,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:54:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:54:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:54:51,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:54:51,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:54:51,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:54:51,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:54:51,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:54:51,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:54:51,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:54:51,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:54:51,340 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:54:51,342 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:54:51,505 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:54:51,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:54:51,543 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:54:51,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:51 BoogieIcfgContainer [2022-11-23 15:54:51,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:54:51,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:54:51,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:54:51,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:54:51,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:50" (1/3) ... [2022-11-23 15:54:51,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:51, skipping insertion in model container [2022-11-23 15:54:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (2/3) ... [2022-11-23 15:54:51,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:51, skipping insertion in model container [2022-11-23 15:54:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:51" (3/3) ... [2022-11-23 15:54:51,556 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-11-23 15:54:51,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:54:51,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:54:51,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:54:51,628 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;@4f3a5386, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:54:51,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:54:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:54:51,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:51,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:51,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2022-11-23 15:54:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946111756] [2022-11-23 15:54:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:51,842 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 15:54:51,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946111756] [2022-11-23 15:54:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946111756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:51,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:51,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:54:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371363555] [2022-11-23 15:54:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:54:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:54:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:54:51,911 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:54:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:51,944 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-23 15:54:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:54:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 15:54:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:51,954 INFO L225 Difference]: With dead ends: 24 [2022-11-23 15:54:51,954 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 15:54:51,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:54:51,960 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:51,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:54:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 15:54:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 15:54:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-23 15:54:52,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-23 15:54:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-23 15:54:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:54:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-23 15:54:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:54:52,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:52,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:54:52,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2022-11-23 15:54:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483462955] [2022-11-23 15:54:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:54:52,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483462955] [2022-11-23 15:54:52,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483462955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:52,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:52,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:54:52,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024131889] [2022-11-23 15:54:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:52,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:54:52,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:54:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:54:52,352 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:52,409 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-23 15:54:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:54:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-23 15:54:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:52,411 INFO L225 Difference]: With dead ends: 19 [2022-11-23 15:54:52,411 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:54:52,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:54:52,413 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:52,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:54:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:54:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:54:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-23 15:54:52,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-11-23 15:54:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:52,420 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-23 15:54:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-23 15:54:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:54:52,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:52,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:54:52,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2022-11-23 15:54:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047455028] [2022-11-23 15:54:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:54:52,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047455028] [2022-11-23 15:54:52,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047455028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:52,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:52,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:54:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151461784] [2022-11-23 15:54:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:54:52,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:54:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:54:52,690 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:52,779 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-23 15:54:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:54:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-23 15:54:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:52,782 INFO L225 Difference]: With dead ends: 29 [2022-11-23 15:54:52,782 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 15:54:52,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:54:52,785 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:52,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:54:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 15:54:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 15:54:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-23 15:54:52,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-11-23 15:54:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:52,800 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-23 15:54:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-23 15:54:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 15:54:52,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:52,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:52,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:54:52,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2022-11-23 15:54:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:52,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784028537] [2022-11-23 15:54:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:52,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:52,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324830924] [2022-11-23 15:54:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:52,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:52,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:54:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:54:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:54:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:54:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:54:53,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:53,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784028537] [2022-11-23 15:54:53,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:53,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324830924] [2022-11-23 15:54:53,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324830924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:54:53,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152430346] [2022-11-23 15:54:53,323 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:54:53,323 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:54:53,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:54:53,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:54:53,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:54:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,596 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:54:53,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:54:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-23 15:54:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:53,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:54:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:53,956 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:54:53,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:54:54,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:54,129 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:54:54,129 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 58 treesize of output 40 [2022-11-23 15:54:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:54,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:54,258 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:54:54,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:54:54,410 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:54:54,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:54:56,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:54:56,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:54:56,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:54:56,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-23 15:54:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848760063] [2022-11-23 15:54:56,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:54:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:54:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:54:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-23 15:54:56,034 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:54:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:56,279 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-23 15:54:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:54:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-11-23 15:54:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:56,282 INFO L225 Difference]: With dead ends: 49 [2022-11-23 15:54:56,282 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:54:56,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:54:56,283 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:56,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:54:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:54:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-23 15:54:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:54:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-23 15:54:56,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-11-23 15:54:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:56,290 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-23 15:54:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:54:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-23 15:54:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:54:56,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:56,291 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:56,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:56,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:56,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2022-11-23 15:54:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565141564] [2022-11-23 15:54:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:56,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:56,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:56,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145264820] [2022-11-23 15:54:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:54:56,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:56,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:56,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:54:56,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:54:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:54:56,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:54:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:54:56,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:54:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:54:56,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565141564] [2022-11-23 15:54:56,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145264820] [2022-11-23 15:54:56,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145264820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:54:56,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806063808] [2022-11-23 15:54:56,734 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:54:56,734 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:54:56,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:54:56,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:54:56,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:54:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:56,874 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:54:56,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:54:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:56,976 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:54:56,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:54:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:54:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,191 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:54:57,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:54:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,295 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:54:57,296 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 58 treesize of output 40 [2022-11-23 15:54:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:57,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:54:57,385 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:54:57,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:54:57,518 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:54:57,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:54:58,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:54:58,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:54:58,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:54:58,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 15:54:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013047647] [2022-11-23 15:54:58,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:54:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:54:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:54:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:54:58,970 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:54:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:59,066 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-23 15:54:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:54:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-23 15:54:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:59,068 INFO L225 Difference]: With dead ends: 28 [2022-11-23 15:54:59,069 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 15:54:59,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:54:59,070 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:54:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 15:54:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-23 15:54:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:54:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-23 15:54:59,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2022-11-23 15:54:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:59,077 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-23 15:54:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:54:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-23 15:54:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:54:59,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:59,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:59,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:59,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2022-11-23 15:54:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778452219] [2022-11-23 15:54:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:59,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016880041] [2022-11-23 15:54:59,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:54:59,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:59,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:59,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:54:59,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:54:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:54:59,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-23 15:54:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:54:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-23 15:54:59,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-23 15:54:59,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:54:59,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:54:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2022-11-23 15:54:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:59,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-23 15:55:00,177 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:55:00,178 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 330 treesize of output 213 [2022-11-23 15:55:00,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:55:00,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:55:00,277 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-23 15:55:00,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-11-23 15:55:00,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-23 15:55:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-23 15:55:00,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-11-23 15:55:00,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 132 [2022-11-23 15:55:00,458 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-23 15:55:00,458 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 2 case distinctions, treesize of input 63 treesize of output 52 [2022-11-23 15:55:00,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-23 15:55:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:00,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:00,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:01,016 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-23 15:55:01,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 122 treesize of output 54 [2022-11-23 15:55:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:01,304 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_213 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 2 c_~ARR_SIZE~0))) is different from false [2022-11-23 15:55:01,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778452219] [2022-11-23 15:55:01,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016880041] [2022-11-23 15:55:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016880041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33773023] [2022-11-23 15:55:01,584 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:01,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:01,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:01,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:01,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,700 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:01,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-23 15:55:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:01,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:01,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:01,925 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:01,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:02,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:02,027 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:02,027 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 58 treesize of output 40 [2022-11-23 15:55:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:02,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:02,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:02,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:02,108 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:02,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:02,187 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:02,208 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:03,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '788#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:03,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:03,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:55:03,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-23 15:55:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400231461] [2022-11-23 15:55:03,888 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 15:55:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 15:55:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1157, Unknown=2, NotChecked=70, Total=1406 [2022-11-23 15:55:03,889 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:04,700 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-23 15:55:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 15:55:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-23 15:55:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:04,704 INFO L225 Difference]: With dead ends: 45 [2022-11-23 15:55:04,704 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 15:55:04,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=230, Invalid=1494, Unknown=2, NotChecked=80, Total=1806 [2022-11-23 15:55:04,705 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:04,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 92 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:55:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 15:55:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-11-23 15:55:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:55:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-23 15:55:04,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-11-23 15:55:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:04,718 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-23 15:55:04,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-23 15:55:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:55:04,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:04,719 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:04,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:55:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:04,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -708711620, now seen corresponding path program 4 times [2022-11-23 15:55:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754439559] [2022-11-23 15:55:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:04,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771896619] [2022-11-23 15:55:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:55:04,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:04,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:04,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:55:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:55:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:05,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:55:05,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754439559] [2022-11-23 15:55:05,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771896619] [2022-11-23 15:55:05,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771896619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:05,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106389515] [2022-11-23 15:55:05,243 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:05,243 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:05,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:05,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:05,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,354 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:05,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,448 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:05,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:55:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:05,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:05,668 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-11-23 15:55:05,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 371 treesize of output 364 [2022-11-23 15:55:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:06,027 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:06,028 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 58 treesize of output 40 [2022-11-23 15:55:06,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:06,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:06,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:06,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:06,110 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:06,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:06,200 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:06,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:07,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:07,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:07,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:07,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-23 15:55:07,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821422812] [2022-11-23 15:55:07,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:07,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 15:55:07,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:07,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 15:55:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:55:07,721 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:07,904 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-23 15:55:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:55:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-23 15:55:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:07,905 INFO L225 Difference]: With dead ends: 57 [2022-11-23 15:55:07,905 INFO L226 Difference]: Without dead ends: 48 [2022-11-23 15:55:07,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 15:55:07,907 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:07,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-23 15:55:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-23 15:55:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:55:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-23 15:55:07,923 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-11-23 15:55:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:07,923 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-23 15:55:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-23 15:55:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:55:07,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:07,925 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:07,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:55:08,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:08,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash -123210237, now seen corresponding path program 5 times [2022-11-23 15:55:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630906121] [2022-11-23 15:55:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:08,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159239306] [2022-11-23 15:55:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:55:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:08,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:08,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:55:08,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 15:55:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:55:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:55:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:08,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:55:08,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630906121] [2022-11-23 15:55:08,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159239306] [2022-11-23 15:55:08,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159239306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173646447] [2022-11-23 15:55:08,515 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:08,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:08,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:08,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:08,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,612 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:08,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:08,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,727 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:08,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:08,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:08,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:08,914 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:09,009 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:09,010 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 58 treesize of output 40 [2022-11-23 15:55:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:09,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:09,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:09,098 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:09,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:09,198 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:09,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:10,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1401#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:10,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:10,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:10,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-23 15:55:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66537314] [2022-11-23 15:55:10,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 15:55:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 15:55:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:55:10,609 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:10,781 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-23 15:55:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:55:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-23 15:55:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:10,782 INFO L225 Difference]: With dead ends: 48 [2022-11-23 15:55:10,782 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 15:55:10,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 15:55:10,783 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:10,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 15:55:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-23 15:55:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:55:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-23 15:55:10,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-11-23 15:55:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:10,802 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-23 15:55:10,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-23 15:55:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:55:10,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:10,804 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:10,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:55:11,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:55:11,010 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash 475184706, now seen corresponding path program 6 times [2022-11-23 15:55:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:11,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335766940] [2022-11-23 15:55:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:11,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:11,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188326418] [2022-11-23 15:55:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:55:11,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:11,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:11,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:11,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:55:11,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:55:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:55:11,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-23 15:55:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:11,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:55:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-23 15:55:11,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-23 15:55:11,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:55:11,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:55:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-23 15:55:11,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:11,495 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-11-23 15:55:11,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-11-23 15:55:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:11,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:11,604 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-11-23 15:55:11,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 103 [2022-11-23 15:55:12,321 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:55:12,322 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 280 [2022-11-23 15:55:12,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:55:12,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:55:12,399 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-23 15:55:12,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 298 [2022-11-23 15:55:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,504 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-11-23 15:55:12,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 227 [2022-11-23 15:55:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,606 INFO L321 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2022-11-23 15:55:12,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 86 [2022-11-23 15:55:12,781 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-23 15:55:12,781 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 2 case distinctions, treesize of input 144 treesize of output 135 [2022-11-23 15:55:12,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-11-23 15:55:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:12,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:55:12,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 124 [2022-11-23 15:55:14,459 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-23 15:55:14,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 207 treesize of output 83 [2022-11-23 15:55:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:14,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:14,908 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_458 (Array Int Int)) (v_ArrVal_457 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_457) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_458) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)))))) 0)) (not (< 3 c_~ARR_SIZE~0))) is different from false [2022-11-23 15:55:16,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335766940] [2022-11-23 15:55:16,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188326418] [2022-11-23 15:55:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188326418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188539585] [2022-11-23 15:55:16,507 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:16,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:16,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:16,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:16,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,637 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:16,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-23 15:55:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:16,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:16,856 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:16,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:16,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:16,950 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:16,951 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 58 treesize of output 40 [2022-11-23 15:55:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:16,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:17,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:17,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:17,023 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:17,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:17,108 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:17,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:19,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1694#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:19,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:19,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:55:19,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-23 15:55:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60360149] [2022-11-23 15:55:19,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:55:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:55:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1354, Unknown=3, NotChecked=76, Total=1640 [2022-11-23 15:55:19,127 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:20,500 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-23 15:55:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 15:55:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-23 15:55:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:20,504 INFO L225 Difference]: With dead ends: 61 [2022-11-23 15:55:20,504 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 15:55:20,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=264, Invalid=1717, Unknown=3, NotChecked=86, Total=2070 [2022-11-23 15:55:20,505 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:20,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 116 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:55:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 15:55:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-23 15:55:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:55:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-23 15:55:20,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-11-23 15:55:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:20,537 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-23 15:55:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-23 15:55:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:55:20,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:20,539 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:20,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:20,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:20,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1845558755, now seen corresponding path program 7 times [2022-11-23 15:55:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:20,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15263484] [2022-11-23 15:55:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:20,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:20,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713329000] [2022-11-23 15:55:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:55:20,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:20,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:55:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:20,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:55:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:20,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:55:21,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15263484] [2022-11-23 15:55:21,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713329000] [2022-11-23 15:55:21,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713329000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700456621] [2022-11-23 15:55:21,100 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:21,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:21,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:21,101 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:21,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,194 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:21,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:21,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-23 15:55:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,393 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:21,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:21,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,485 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:21,486 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 58 treesize of output 40 [2022-11-23 15:55:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:21,561 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:21,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:21,658 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:21,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:23,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2057#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:23,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:23,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:23,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-23 15:55:23,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305687145] [2022-11-23 15:55:23,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 15:55:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 15:55:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-11-23 15:55:23,126 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:23,479 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-11-23 15:55:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:55:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-23 15:55:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:23,484 INFO L225 Difference]: With dead ends: 81 [2022-11-23 15:55:23,484 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 15:55:23,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 15:55:23,485 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:23,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 15:55:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-11-23 15:55:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:55:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-11-23 15:55:23,513 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2022-11-23 15:55:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:23,513 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-11-23 15:55:23,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-11-23 15:55:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:55:23,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:23,515 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:23,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:23,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:23,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1478734852, now seen corresponding path program 8 times [2022-11-23 15:55:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:23,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508425986] [2022-11-23 15:55:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:23,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:23,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018765063] [2022-11-23 15:55:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:55:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:23,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:23,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:55:24,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:55:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:55:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:55:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:24,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:55:24,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508425986] [2022-11-23 15:55:24,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018765063] [2022-11-23 15:55:24,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018765063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91392582] [2022-11-23 15:55:24,300 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:24,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:24,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:24,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:24,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,408 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:24,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,504 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:24,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:24,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,668 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:24,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:24,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,763 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:24,763 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 58 treesize of output 40 [2022-11-23 15:55:24,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:24,837 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:24,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:24,909 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:24,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:26,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2469#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:26,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:26,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:26,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-23 15:55:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392151867] [2022-11-23 15:55:26,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:26,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 15:55:26,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 15:55:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-23 15:55:26,145 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:26,402 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-23 15:55:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:55:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-23 15:55:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:26,403 INFO L225 Difference]: With dead ends: 71 [2022-11-23 15:55:26,403 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 15:55:26,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 15:55:26,404 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:26,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 15:55:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-11-23 15:55:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:55:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-23 15:55:26,430 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2022-11-23 15:55:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:26,430 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-23 15:55:26,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-23 15:55:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:55:26,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:26,431 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:26,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:26,639 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1403594601, now seen corresponding path program 9 times [2022-11-23 15:55:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020759334] [2022-11-23 15:55:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:26,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747372684] [2022-11-23 15:55:26,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:55:26,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:26,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:26,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:55:27,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:55:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:55:27,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-23 15:55:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:27,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:55:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-23 15:55:27,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-11-23 15:55:27,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 16 [2022-11-23 15:55:27,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-23 15:55:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-23 15:55:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,300 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-23 15:55:27,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-23 15:55:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,414 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-23 15:55:27,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-23 15:55:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:27,540 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-11-23 15:55:27,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 206 treesize of output 133 [2022-11-23 15:55:28,996 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:55:28,997 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 461 treesize of output 312 [2022-11-23 15:55:29,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:55:29,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:55:29,107 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-23 15:55:29,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 330 [2022-11-23 15:55:29,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,381 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-11-23 15:55:29,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 165 [2022-11-23 15:55:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:29,562 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-11-23 15:55:29,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 274 treesize of output 321 [2022-11-23 15:55:30,635 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-23 15:55:30,636 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 2 case distinctions, treesize of input 1236 treesize of output 1145 [2022-11-23 15:55:30,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-23 15:55:34,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:55:34,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 270 [2022-11-23 15:55:34,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:55:34,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 392 [2022-11-23 15:55:34,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:55:34,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 395 [2022-11-23 15:55:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:41,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:42,435 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_740 (Array Int Int)) (v_ArrVal_741 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_740) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)))))) 0)) (not (< 4 c_~ARR_SIZE~0))) is different from false [2022-11-23 15:55:42,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:42,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020759334] [2022-11-23 15:55:42,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:42,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747372684] [2022-11-23 15:55:42,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747372684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:42,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146289588] [2022-11-23 15:55:42,672 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:42,672 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:42,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:42,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:42,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,778 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:42,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,881 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:42,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:42,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:42,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:43,055 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:43,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:43,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:43,143 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:43,143 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 58 treesize of output 40 [2022-11-23 15:55:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:43,218 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:43,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:43,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:43,311 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:45,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:45,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:45,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:55:45,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-23 15:55:45,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894271985] [2022-11-23 15:55:45,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:45,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:55:45,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:45,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:55:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1573, Unknown=1, NotChecked=82, Total=1892 [2022-11-23 15:55:45,450 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:47,821 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-23 15:55:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 15:55:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-23 15:55:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:47,823 INFO L225 Difference]: With dead ends: 79 [2022-11-23 15:55:47,824 INFO L226 Difference]: Without dead ends: 76 [2022-11-23 15:55:47,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=295, Invalid=1964, Unknown=1, NotChecked=92, Total=2352 [2022-11-23 15:55:47,825 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:47,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 145 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:55:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-23 15:55:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-11-23 15:55:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:55:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-23 15:55:47,866 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2022-11-23 15:55:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:47,866 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-23 15:55:47,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:55:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-23 15:55:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:55:47,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:47,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:47,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:55:48,074 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1777613253, now seen corresponding path program 1 times [2022-11-23 15:55:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:48,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060360378] [2022-11-23 15:55:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:48,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:48,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013225559] [2022-11-23 15:55:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:48,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:48,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:48,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:48,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:55:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 15:55:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:48,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:55:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-23 15:55:48,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-23 15:55:48,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:55:48,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:55:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-23 15:55:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-23 15:55:48,913 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:55:48,914 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 103 [2022-11-23 15:55:48,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-11-23 15:55:48,954 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-23 15:55:48,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 93 [2022-11-23 15:55:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 44 [2022-11-23 15:55:48,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:48,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:48,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-23 15:55:49,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-11-23 15:55:49,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-23 15:55:49,566 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:55:49,566 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 245 [2022-11-23 15:55:49,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:55:49,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:55:49,629 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-11-23 15:55:49,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 221 [2022-11-23 15:55:49,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:49,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-23 15:55:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:49,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:49,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 49 [2022-11-23 15:55:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:49,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 219 [2022-11-23 15:55:49,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-23 15:55:49,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-23 15:55:50,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:50,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:50,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:50,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:50,425 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-23 15:55:50,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 58 [2022-11-23 15:55:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:50,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:51,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060360378] [2022-11-23 15:55:51,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013225559] [2022-11-23 15:55:51,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013225559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574173719] [2022-11-23 15:55:51,660 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:51,661 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:51,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:51,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:51,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,775 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,874 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:51,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:51,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,048 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:52,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:52,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,143 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:52,143 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 58 treesize of output 40 [2022-11-23 15:55:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,210 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:52,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:52,286 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:52,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:52,366 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:52,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:54,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3232#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:54,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:54,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:55:54,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-23 15:55:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21728903] [2022-11-23 15:55:54,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:55:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:55:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1550, Unknown=8, NotChecked=0, Total=1722 [2022-11-23 15:55:54,410 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:55:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:56,233 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-23 15:55:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:55:56,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-23 15:55:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:56,235 INFO L225 Difference]: With dead ends: 75 [2022-11-23 15:55:56,235 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 15:55:56,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=296, Invalid=2347, Unknown=9, NotChecked=0, Total=2652 [2022-11-23 15:55:56,236 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:56,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 131 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:55:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 15:55:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-23 15:55:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:55:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-11-23 15:55:56,268 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2022-11-23 15:55:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:56,269 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-11-23 15:55:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:55:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-11-23 15:55:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:55:56,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:56,270 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:56,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:56,473 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 561494428, now seen corresponding path program 10 times [2022-11-23 15:55:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087855234] [2022-11-23 15:55:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:56,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066145062] [2022-11-23 15:55:56,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:55:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:56,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:56,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:55:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:55:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:56,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:55:56,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:56,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087855234] [2022-11-23 15:55:56,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:55:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066145062] [2022-11-23 15:55:56,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066145062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126768162] [2022-11-23 15:55:56,882 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:55:56,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:56,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:56,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:56,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:55:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:56,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:56,979 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:55:56,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:55:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,064 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:55:57,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:55:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:55:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,225 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:55:57,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:55:57,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,309 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:55:57,309 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 58 treesize of output 40 [2022-11-23 15:55:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:55:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:55:57,392 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:55:57,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:55:57,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:55:57,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:58,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3648#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:55:58,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:58,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:58,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-23 15:55:58,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202492207] [2022-11-23 15:55:58,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:58,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:55:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:55:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:55:58,803 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:59,235 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-23 15:55:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 15:55:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-23 15:55:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:59,236 INFO L225 Difference]: With dead ends: 86 [2022-11-23 15:55:59,236 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 15:55:59,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:55:59,238 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:59,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 86 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 15:55:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-11-23 15:55:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:55:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-23 15:55:59,276 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 27 [2022-11-23 15:55:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:59,276 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-23 15:55:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:55:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-23 15:55:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:55:59,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:59,278 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:59,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:59,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:55:59,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 587607715, now seen corresponding path program 11 times [2022-11-23 15:55:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:59,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046120329] [2022-11-23 15:55:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:59,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:59,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:55:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047423585] [2022-11-23 15:55:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:55:59,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:59,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:59,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:55:59,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:55:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:55:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:55:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:59,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:56:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:56:00,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046120329] [2022-11-23 15:56:00,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:56:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047423585] [2022-11-23 15:56:00,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047423585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:56:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881901043] [2022-11-23 15:56:00,076 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:56:00,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:56:00,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:56:00,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:56:00,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:56:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,176 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:56:00,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:56:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,266 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:56:00,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:56:00,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:56:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,410 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:56:00,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:56:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,503 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:56:00,503 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 58 treesize of output 40 [2022-11-23 15:56:00,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:00,574 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:56:00,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:56:00,636 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:56:00,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:56:01,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4095#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:56:01,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:56:01,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:56:01,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-23 15:56:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681352922] [2022-11-23 15:56:01,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:56:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:56:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:56:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:56:01,891 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:56:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:02,177 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-11-23 15:56:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:56:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-23 15:56:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:02,178 INFO L225 Difference]: With dead ends: 75 [2022-11-23 15:56:02,178 INFO L226 Difference]: Without dead ends: 72 [2022-11-23 15:56:02,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:56:02,179 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:02,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 110 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:56:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-23 15:56:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-11-23 15:56:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:56:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-23 15:56:02,207 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 27 [2022-11-23 15:56:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:02,207 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-23 15:56:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:56:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-23 15:56:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:56:02,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:02,208 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:02,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-23 15:56:02,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:56:02,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1035704738, now seen corresponding path program 12 times [2022-11-23 15:56:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:02,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574778702] [2022-11-23 15:56:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:02,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:56:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125976365] [2022-11-23 15:56:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:56:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:56:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:56:02,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:56:02,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:56:02,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:56:02,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:56:02,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-23 15:56:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:56:02,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:56:02,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:02,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-23 15:56:02,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-23 15:56:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:56:02,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:56:03,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 56 [2022-11-23 15:56:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,113 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-23 15:56:03,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-23 15:56:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,256 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-23 15:56:03,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-23 15:56:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,422 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-11-23 15:56:03,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 162 treesize of output 157 [2022-11-23 15:56:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:03,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:03,786 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-23 15:56:03,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 248 treesize of output 163 [2022-11-23 15:56:04,997 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:56:04,997 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 503 treesize of output 344 [2022-11-23 15:56:05,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:56:05,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:56:05,101 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-23 15:56:05,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 362 [2022-11-23 15:56:05,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,363 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-11-23 15:56:05,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 235 treesize of output 289 [2022-11-23 15:56:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:05,547 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-11-23 15:56:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-11-23 15:56:05,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-11-23 15:56:05,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-23 15:56:11,427 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:56:11,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 754 [2022-11-23 15:56:11,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 749 treesize of output 673 [2022-11-23 15:56:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 770 treesize of output 872 [2022-11-23 15:56:12,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 15:56:12,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 206 [2022-11-23 15:56:12,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 127 [2022-11-23 15:56:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:12,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:56:13,911 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1179 (Array Int Int)) (v_ArrVal_1178 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1178) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 5 c_~ARR_SIZE~0))) is different from false [2022-11-23 15:56:14,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:14,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574778702] [2022-11-23 15:56:14,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:56:14,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125976365] [2022-11-23 15:56:14,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125976365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:56:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543343488] [2022-11-23 15:56:14,444 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:56:14,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:56:14,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:56:14,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:56:14,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:56:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,535 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-23 15:56:14,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-23 15:56:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,626 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-23 15:56:14,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-23 15:56:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-23 15:56:14,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,794 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-23 15:56:14,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-23 15:56:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,877 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-23 15:56:14,877 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 58 treesize of output 40 [2022-11-23 15:56:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:14,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:14,955 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-23 15:56:14,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-23 15:56:15,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-23 15:56:15,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:56:17,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4491#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#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 (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:56:17,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:56:17,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:56:17,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-23 15:56:17,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380297512] [2022-11-23 15:56:17,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 15:56:17,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:56:17,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:17,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:56:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1804, Unknown=3, NotChecked=88, Total=2162 [2022-11-23 15:56:17,352 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:56:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:20,705 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-11-23 15:56:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 15:56:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 15:56:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:20,708 INFO L225 Difference]: With dead ends: 83 [2022-11-23 15:56:20,708 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 15:56:20,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=328, Invalid=2223, Unknown=3, NotChecked=98, Total=2652 [2022-11-23 15:56:20,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:20,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 15:56:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 15:56:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-23 15:56:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:56:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-23 15:56:20,754 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2022-11-23 15:56:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:20,755 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-23 15:56:20,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:56:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-23 15:56:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:56:20,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:20,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:20,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:56:20,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:56:20,962 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1177873296, now seen corresponding path program 2 times [2022-11-23 15:56:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:20,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646255874] [2022-11-23 15:56:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:20,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:20,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:56:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614157705] [2022-11-23 15:56:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:56:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:56:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:56:20,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:56:21,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf14db2-b1e7-422e-a5a1-42f1dab05e53/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:56:21,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:56:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:56:21,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-23 15:56:21,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:56:21,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:56:21,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:21,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-23 15:56:21,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-23 15:56:21,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2022-11-23 15:56:21,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:21,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-11-23 15:56:21,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-23 15:56:21,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 44 [2022-11-23 15:56:21,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-23 15:56:21,686 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-23 15:56:21,686 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 147 [2022-11-23 15:56:21,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 53 [2022-11-23 15:56:21,734 INFO L321 Elim1Store]: treesize reduction 56, result has 8.2 percent of original size [2022-11-23 15:56:21,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 105 [2022-11-23 15:56:21,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 59 [2022-11-23 15:56:21,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2022-11-23 15:56:21,830 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-23 15:56:21,831 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 2 case distinctions, treesize of input 86 treesize of output 75 [2022-11-23 15:56:21,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 7 [2022-11-23 15:56:21,985 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-11-23 15:56:21,985 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 139 [2022-11-23 15:56:21,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 49 [2022-11-23 15:56:22,022 INFO L321 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2022-11-23 15:56:22,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-23 15:56:22,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 66 [2022-11-23 15:56:22,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 66 [2022-11-23 15:56:22,730 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 15:56:22,731 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 427 treesize of output 304 [2022-11-23 15:56:22,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-23 15:56:22,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-23 15:56:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 250 [2022-11-23 15:56:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,893 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2022-11-23 15:56:22,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2022-11-23 15:56:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-11-23 15:56:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:22,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:23,014 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-11-23 15:56:23,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2022-11-23 15:56:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:23,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 112 [2022-11-23 15:56:23,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 50 [2022-11-23 15:56:23,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2022-11-23 15:56:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:23,349 INFO L321 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2022-11-23 15:56:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 68 [2022-11-23 15:56:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:23,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:56:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:23,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-23 15:56:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:27,059 INFO L321 Elim1Store]: treesize reduction 1027, result has 31.2 percent of original size [2022-11-23 15:56:27,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 20 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 102 case distinctions, treesize of input 358 treesize of output 646 [2022-11-23 15:56:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:47,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:57:43,169 WARN L233 SmtUtils]: Spent 55.25s on a formula simplification. DAG size of input: 1921 DAG size of output: 868 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 15:57:43,172 INFO L321 Elim1Store]: treesize reduction 7488, result has 32.9 percent of original size [2022-11-23 15:57:43,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 6 disjoint index pairs (out of 903 index pairs), introduced 43 new quantified variables, introduced 903 case distinctions, treesize of input 565 treesize of output 3853