./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI --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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:18:23,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:18:23,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:18:23,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:18:23,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:18:23,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:18:23,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:18:23,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:18:23,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:18:23,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:18:23,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:18:23,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:18:23,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:18:23,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:18:23,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:18:23,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:18:23,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:18:23,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:18:23,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:18:23,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:18:23,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:18:23,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:18:23,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:18:23,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:18:23,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:18:23,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:18:23,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:18:23,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:18:23,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:18:23,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:18:23,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:18:23,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:18:23,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:18:23,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:18:23,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:18:23,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:18:23,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:18:23,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:18:23,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:18:23,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:18:23,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:18:23,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:18:23,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:18:23,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:18:23,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:18:23,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:18:23,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:18:23,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:18:23,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:18:23,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:18:23,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:18:23,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:18:23,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:18:23,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:18:23,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:18:23,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:18:23,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:18:23,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:18:23,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:18:23,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:18:23,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:18:23,671 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:18:23,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:18:23,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:18:23,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:18:23,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:18:23,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:18:23,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:18:23,673 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:18:23,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:18:23,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:18:23,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:18:23,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:18:23,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:18:23,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:23,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:18:23,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:18:23,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:18:23,676 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_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2022-11-03 02:18:23,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:18:24,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:18:24,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:18:24,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:18:24,018 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:18:24,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-03 02:18:24,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/data/6dbfca277/e7d203b2ec174e9488b9c7df272000b1/FLAG1192d6ef8 [2022-11-03 02:18:24,559 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:18:24,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-03 02:18:24,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/data/6dbfca277/e7d203b2ec174e9488b9c7df272000b1/FLAG1192d6ef8 [2022-11-03 02:18:24,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/data/6dbfca277/e7d203b2ec174e9488b9c7df272000b1 [2022-11-03 02:18:24,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:18:24,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:18:24,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:24,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:18:24,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:18:24,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ff1ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24, skipping insertion in model container [2022-11-03 02:18:24,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:18:24,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:18:25,139 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-03 02:18:25,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:25,176 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:18:25,188 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-03 02:18:25,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:25,214 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:18:25,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25 WrapperNode [2022-11-03 02:18:25,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:25,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:25,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:18:25,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:18:25,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,251 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-11-03 02:18:25,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:25,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:18:25,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:18:25,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:18:25,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:18:25,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:18:25,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:18:25,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:18:25,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (1/1) ... [2022-11-03 02:18:25,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:25,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:18:25,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:18:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:18:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:18:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:18:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:18:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:18:25,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:18:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:18:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:18:25,482 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:18:25,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:25,713 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:25,819 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:25,833 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:18:25,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:25 BoogieIcfgContainer [2022-11-03 02:18:25,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:25,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:25,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:25,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:25,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:18:24" (1/3) ... [2022-11-03 02:18:25,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137fe8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:25, skipping insertion in model container [2022-11-03 02:18:25,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:25" (2/3) ... [2022-11-03 02:18:25,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137fe8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:25, skipping insertion in model container [2022-11-03 02:18:25,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:25" (3/3) ... [2022-11-03 02:18:25,856 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-11-03 02:18:25,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:25,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:25,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:25,935 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;@48572a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:25,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:18:25,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:25,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:25,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1379774409, now seen corresponding path program 1 times [2022-11-03 02:18:25,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:25,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950867598] [2022-11-03 02:18:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:26,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:26,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950867598] [2022-11-03 02:18:26,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950867598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:26,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:26,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:18:26,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838150595] [2022-11-03 02:18:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:18:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:18:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:26,330 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:26,439 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2022-11-03 02:18:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:18:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:18:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:26,457 INFO L225 Difference]: With dead ends: 33 [2022-11-03 02:18:26,458 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 02:18:26,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:26,464 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:26,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 02:18:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 02:18:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-11-03 02:18:26,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2022-11-03 02:18:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:26,502 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-11-03 02:18:26,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2022-11-03 02:18:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:18:26,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:26,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:26,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:18:26,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939476, now seen corresponding path program 1 times [2022-11-03 02:18:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:26,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272609855] [2022-11-03 02:18:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:18:26,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:26,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272609855] [2022-11-03 02:18:26,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272609855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:26,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:26,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:18:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014249733] [2022-11-03 02:18:26,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:26,710 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:26,806 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-03 02:18:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:18:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:18:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:26,807 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:18:26,807 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 02:18:26,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:26,809 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:26,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 02:18:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-03 02:18:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-03 02:18:26,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2022-11-03 02:18:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:26,816 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-03 02:18:26,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-03 02:18:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:18:26,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:26,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:26,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:18:26,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1350556832, now seen corresponding path program 1 times [2022-11-03 02:18:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:26,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301818511] [2022-11-03 02:18:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:18:26,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301818511] [2022-11-03 02:18:26,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301818511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:26,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:18:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360641487] [2022-11-03 02:18:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:26,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:18:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:18:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:26,910 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:26,946 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-03 02:18:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:18:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:18:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:26,947 INFO L225 Difference]: With dead ends: 27 [2022-11-03 02:18:26,947 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:18:26,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:26,949 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:26,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:18:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:18:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 02:18:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-03 02:18:26,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2022-11-03 02:18:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:26,957 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-03 02:18:26,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-03 02:18:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:18:26,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:26,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:26,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:18:26,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash 141282585, now seen corresponding path program 1 times [2022-11-03 02:18:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680586343] [2022-11-03 02:18:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:18:27,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680586343] [2022-11-03 02:18:27,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680586343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:27,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683401293] [2022-11-03 02:18:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:27,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:27,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:18:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:18:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:18:27,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:18:27,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683401293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743429486] [2022-11-03 02:18:27,511 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 02:18:27,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:27,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:27,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:27,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,726 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:18:27,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:18:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,853 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:27,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:18:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:28,284 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:18:28,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:18:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:28,465 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:28,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:28,580 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:18:28,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:18:28,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:28,681 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:18:28,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-03 02:18:29,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:30,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1743429486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:30,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:30,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2022-11-03 02:18:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163202680] [2022-11-03 02:18:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:18:30,905 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:31,572 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-03 02:18:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:18:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:31,574 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:18:31,574 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:18:31,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:18:31,576 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:31,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:18:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-03 02:18:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-03 02:18:31,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2022-11-03 02:18:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:31,587 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-03 02:18:31,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-03 02:18:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:18:31,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:31,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:31,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:18:31,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:31,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1119880071, now seen corresponding path program 1 times [2022-11-03 02:18:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821178161] [2022-11-03 02:18:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:18:32,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821178161] [2022-11-03 02:18:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821178161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059052458] [2022-11-03 02:18:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:32,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:32,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:18:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:18:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:18:32,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:18:32,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059052458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988996945] [2022-11-03 02:18:32,215 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:18:32,215 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:32,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:32,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:32,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,292 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:18:32,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:18:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,383 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:32,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:18:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:32,595 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:18:32,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:18:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:32,691 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:32,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:32,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:32,771 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:18:32,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:18:32,970 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:32,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:33,364 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:33,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:33,518 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:33,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:33,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:34,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:34,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:34,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:34,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-03 02:18:34,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171790118] [2022-11-03 02:18:34,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:34,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:18:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:18:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:18:34,869 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:35,106 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-11-03 02:18:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:18:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:18:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:35,107 INFO L225 Difference]: With dead ends: 84 [2022-11-03 02:18:35,108 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:18:35,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:18:35,109 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:35,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:18:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2022-11-03 02:18:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-03 02:18:35,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2022-11-03 02:18:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:35,122 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-03 02:18:35,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-03 02:18:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:18:35,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:35,123 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:35,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:35,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:35,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1902894455, now seen corresponding path program 2 times [2022-11-03 02:18:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:35,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014719627] [2022-11-03 02:18:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:35,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:18:35,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:35,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014719627] [2022-11-03 02:18:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014719627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048471709] [2022-11-03 02:18:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:18:35,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:35,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:35,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:35,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:18:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:18:35,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:18:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:35,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 22 [2022-11-03 02:18:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:18:35,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:35,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 26 [2022-11-03 02:18:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:18:35,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048471709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:35,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063874360] [2022-11-03 02:18:35,867 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:18:35,867 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:35,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:35,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:35,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:35,936 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:18:35,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:18:35,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,017 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:36,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:36,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:18:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:36,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:36,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:36,222 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:18:36,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:18:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:36,317 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:36,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:36,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:36,386 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:18:36,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:18:36,587 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:36,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:36,916 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:36,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:37,086 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:37,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:37,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:38,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:38,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:38,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:38,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-03 02:18:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703257629] [2022-11-03 02:18:38,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:38,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:18:38,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:18:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:18:38,566 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:39,643 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2022-11-03 02:18:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:18:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 02:18:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:39,646 INFO L225 Difference]: With dead ends: 201 [2022-11-03 02:18:39,646 INFO L226 Difference]: Without dead ends: 177 [2022-11-03 02:18:39,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=924, Invalid=2858, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:18:39,653 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 288 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:39,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 85 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-03 02:18:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 43. [2022-11-03 02:18:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 02:18:39,693 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 23 [2022-11-03 02:18:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:39,694 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 02:18:39,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 02:18:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:18:39,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:39,696 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:39,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:39,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:39,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash -318738090, now seen corresponding path program 1 times [2022-11-03 02:18:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70085750] [2022-11-03 02:18:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:40,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70085750] [2022-11-03 02:18:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70085750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592355363] [2022-11-03 02:18:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:40,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:40,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:40,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:18:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:18:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:40,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:40,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592355363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227108095] [2022-11-03 02:18:40,540 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:18:40,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:40,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:40,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:40,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,612 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:18:40,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:18:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,704 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:40,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:40,928 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 02:18:40,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 346 treesize of output 336 [2022-11-03 02:18:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:41,264 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:41,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:41,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:41,331 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:18:41,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:18:41,502 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:41,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:41,815 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:41,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:41,947 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:41,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:42,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:42,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 95 treesize of output 88 [2022-11-03 02:18:42,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:42,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:43,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1541#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:43,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:43,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:43,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-03 02:18:43,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406716523] [2022-11-03 02:18:43,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:18:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:18:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=986, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:18:43,207 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:43,331 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2022-11-03 02:18:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:18:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 02:18:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:43,332 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:18:43,333 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 02:18:43,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=420, Invalid=986, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:18:43,336 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:43,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 02:18:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-03 02:18:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-03 02:18:43,357 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 28 [2022-11-03 02:18:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:43,358 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-03 02:18:43,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-03 02:18:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:18:43,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:43,359 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:43,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:43,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:18:43,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash -850733375, now seen corresponding path program 2 times [2022-11-03 02:18:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:43,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644505178] [2022-11-03 02:18:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:44,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644505178] [2022-11-03 02:18:44,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644505178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566437500] [2022-11-03 02:18:44,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:18:44,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:44,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:18:44,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:18:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:18:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:44,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-03 02:18:44,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-03 02:18:44,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566437500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101068835] [2022-11-03 02:18:44,543 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:18:44,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:44,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:44,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:44,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:44,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,635 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:44,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:18:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:18:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:44,835 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:18:44,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:18:44,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:44,929 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:44,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:44,993 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:18:44,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-03 02:18:45,135 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:45,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:45,399 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:45,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:45,541 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:45,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:45,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:45,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 95 treesize of output 88 [2022-11-03 02:18:45,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:45,803 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:47,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2050#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:47,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:47,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:47,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 26 [2022-11-03 02:18:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471990776] [2022-11-03 02:18:47,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:18:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:18:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:18:47,144 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:47,853 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2022-11-03 02:18:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:18:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-03 02:18:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:47,855 INFO L225 Difference]: With dead ends: 225 [2022-11-03 02:18:47,855 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 02:18:47,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:18:47,857 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 338 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 92 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 02:18:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 81. [2022-11-03 02:18:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2022-11-03 02:18:47,893 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 37 [2022-11-03 02:18:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:47,893 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2022-11-03 02:18:47,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2022-11-03 02:18:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:18:47,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:47,895 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:47,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:48,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:48,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2029273142, now seen corresponding path program 3 times [2022-11-03 02:18:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333892204] [2022-11-03 02:18:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:18:48,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333892204] [2022-11-03 02:18:48,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333892204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817872111] [2022-11-03 02:18:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:18:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:48,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:48,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:18:49,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:18:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:18:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:18:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:50,134 INFO L356 Elim1Store]: treesize reduction 100, result has 27.5 percent of original size [2022-11-03 02:18:50,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 60 [2022-11-03 02:18:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-03 02:18:50,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:54,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 56 [2022-11-03 02:18:54,237 INFO L356 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-11-03 02:18:54,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 81 [2022-11-03 02:18:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-03 02:18:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817872111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715937060] [2022-11-03 02:18:54,302 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:18:54,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:54,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:54,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:54,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,396 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:18:54,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:18:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:18:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:18:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:54,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:54,580 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:18:54,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:18:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:54,673 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:18:54,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:18:54,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:18:54,887 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:18:54,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:18:55,203 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:55,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:55,325 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:18:55,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:18:55,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:55,494 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:18:55,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 02:18:55,535 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:18:55,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:18:55,617 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:56,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2921#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:56,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:56,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:56,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2022-11-03 02:18:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750125324] [2022-11-03 02:18:56,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:56,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:18:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:18:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1704, Unknown=3, NotChecked=0, Total=2070 [2022-11-03 02:18:56,871 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:09,558 WARN L234 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 75 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:09,582 INFO L93 Difference]: Finished difference Result 155 states and 210 transitions. [2022-11-03 02:19:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:19:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:19:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:09,584 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:19:09,584 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:19:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=390, Invalid=1959, Unknown=3, NotChecked=0, Total=2352 [2022-11-03 02:19:09,586 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:09,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-11-03 02:19:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:19:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-11-03 02:19:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3333333333333333) internal successors, (116), 87 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 116 transitions. [2022-11-03 02:19:09,625 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 116 transitions. Word has length 50 [2022-11-03 02:19:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:09,625 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 116 transitions. [2022-11-03 02:19:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 116 transitions. [2022-11-03 02:19:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:19:09,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:09,627 INFO L195 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:09,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:09,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:09,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2128836676, now seen corresponding path program 4 times [2022-11-03 02:19:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054081686] [2022-11-03 02:19:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:19:10,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054081686] [2022-11-03 02:19:10,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054081686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807102755] [2022-11-03 02:19:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:19:10,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:10,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:10,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:19:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:19:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:19:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:19:11,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807102755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553948938] [2022-11-03 02:19:11,832 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:19:11,832 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:11,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:11,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:11,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:11,915 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:19:11,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:19:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:11,999 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:19:11,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:19:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:19:12,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:12,172 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:19:12,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:19:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:12,253 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:19:12,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:19:12,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:12,474 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:19:12,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:19:12,973 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:19:12,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:19:13,215 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:19:13,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:19:13,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:19:13,424 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:19:13,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 02:19:13,471 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:19:13,472 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:19:13,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:19:13,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:14,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3743#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:14,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:14,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:14,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2022-11-03 02:19:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775712445] [2022-11-03 02:19:14,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:14,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 02:19:14,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 02:19:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=3197, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:19:14,636 INFO L87 Difference]: Start difference. First operand 88 states and 116 transitions. Second operand has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:14,829 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2022-11-03 02:19:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:19:14,829 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:19:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:14,831 INFO L225 Difference]: With dead ends: 178 [2022-11-03 02:19:14,831 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 02:19:14,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1773, Invalid=3197, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:19:14,833 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:14,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:19:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 02:19:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-03 02:19:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2022-11-03 02:19:14,872 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 52 [2022-11-03 02:19:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:14,872 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2022-11-03 02:19:14,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2022-11-03 02:19:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:19:14,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:14,874 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:14,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 02:19:15,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:19:15,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1801587332, now seen corresponding path program 5 times [2022-11-03 02:19:15,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:15,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400723022] [2022-11-03 02:19:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:15,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:19:17,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400723022] [2022-11-03 02:19:17,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400723022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700766938] [2022-11-03 02:19:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:19:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:17,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:17,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:19:17,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:19:17,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:19:17,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:17,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 22 [2022-11-03 02:19:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2022-11-03 02:19:17,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2022-11-03 02:19:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700766938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729124802] [2022-11-03 02:19:18,130 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:19:18,130 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:18,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:18,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:18,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,232 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:19:18,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:19:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:19:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:19:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:18,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:18,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:18,425 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:19:18,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:19:18,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:18,506 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:19:18,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:19:18,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:18,709 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:19:18,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:19:19,014 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:19:19,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:19:19,138 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:19:19,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:19:19,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:19:19,327 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:19:19,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 02:19:19,366 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:19:19,367 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:19:19,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:19:19,443 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:20,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4760#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:20,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:20,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:20,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 8, 8] total 54 [2022-11-03 02:19:20,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177399809] [2022-11-03 02:19:20,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:20,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:19:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:19:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=2904, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:19:20,687 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 54 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:28,666 INFO L93 Difference]: Finished difference Result 966 states and 1109 transitions. [2022-11-03 02:19:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-03 02:19:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 54 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-03 02:19:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:28,670 INFO L225 Difference]: With dead ends: 966 [2022-11-03 02:19:28,670 INFO L226 Difference]: Without dead ends: 898 [2022-11-03 02:19:28,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12165 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=10971, Invalid=26859, Unknown=0, NotChecked=0, Total=37830 [2022-11-03 02:19:28,678 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2028 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2028 Valid, 300 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:19:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-03 02:19:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 184. [2022-11-03 02:19:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2022-11-03 02:19:28,756 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 72 [2022-11-03 02:19:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:28,757 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2022-11-03 02:19:28,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 54 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2022-11-03 02:19:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:19:28,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:28,759 INFO L195 NwaCegarLoop]: trace histogram [44, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:28,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:19:28,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash -508577946, now seen corresponding path program 6 times [2022-11-03 02:19:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110709562] [2022-11-03 02:19:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:19:31,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110709562] [2022-11-03 02:19:31,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110709562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761174494] [2022-11-03 02:19:31,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:19:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:31,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:31,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:19:31,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:19:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:19:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:32,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:32,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 50 [2022-11-03 02:19:32,564 INFO L356 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2022-11-03 02:19:32,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-11-03 02:19:32,661 INFO L356 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2022-11-03 02:19:32,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-11-03 02:19:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2022-11-03 02:19:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:09,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 86 [2022-11-03 02:21:09,385 INFO L356 Elim1Store]: treesize reduction 15, result has 68.1 percent of original size [2022-11-03 02:21:09,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1781 treesize of output 1307 [2022-11-03 02:21:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2022-11-03 02:21:09,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761174494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:09,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371735169] [2022-11-03 02:21:09,567 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:21:09,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:09,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:09,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:09,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,655 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:21:09,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:21:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,755 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:21:09,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:21:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:21:09,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:09,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:09,976 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:21:09,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:21:10,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:10,062 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:21:10,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:21:10,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:10,293 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:21:10,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:21:10,773 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:10,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:11,089 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:11,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:11,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:11,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:11,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:13,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7256#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:13,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:13,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:13,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 13, 13] total 68 [2022-11-03 02:21:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932366375] [2022-11-03 02:21:13,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:13,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 02:21:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 02:21:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=4805, Unknown=115, NotChecked=0, Total=6320 [2022-11-03 02:21:13,244 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 68 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:16,122 INFO L93 Difference]: Finished difference Result 390 states and 520 transitions. [2022-11-03 02:21:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-03 02:21:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 02:21:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:16,124 INFO L225 Difference]: With dead ends: 390 [2022-11-03 02:21:16,125 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 02:21:16,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 102.5s TimeCoverageRelationStatistics Valid=1433, Invalid=5424, Unknown=115, NotChecked=0, Total=6972 [2022-11-03 02:21:16,127 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:16,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 74 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 275 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-11-03 02:21:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 02:21:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 230. [2022-11-03 02:21:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.2838427947598254) internal successors, (294), 229 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 294 transitions. [2022-11-03 02:21:16,231 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 294 transitions. Word has length 80 [2022-11-03 02:21:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:16,231 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 294 transitions. [2022-11-03 02:21:16,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 294 transitions. [2022-11-03 02:21:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:21:16,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:16,234 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:16,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:16,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:21:16,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash -632185749, now seen corresponding path program 1 times [2022-11-03 02:21:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540317342] [2022-11-03 02:21:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:21:19,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540317342] [2022-11-03 02:21:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540317342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802868521] [2022-11-03 02:21:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:19,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:19,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:21:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:21:20,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:21:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:21:25,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802868521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851458540] [2022-11-03 02:21:25,074 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:21:25,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:25,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:25,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:25,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,181 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:21:25,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:21:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 39 [2022-11-03 02:21:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:21:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:25,371 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:21:25,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:21:25,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:25,478 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:21:25,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:21:25,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:25,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:25,811 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:21:25,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:21:26,132 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:26,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:26,248 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:26,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:26,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:26,454 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:21:26,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 02:21:26,493 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:21:26,494 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:21:26,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:26,665 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:28,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9090#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:28,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:28,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:28,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2022-11-03 02:21:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684911105] [2022-11-03 02:21:28,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-11-03 02:21:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-11-03 02:21:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8789, Invalid=14467, Unknown=0, NotChecked=0, Total=23256 [2022-11-03 02:21:28,596 INFO L87 Difference]: Start difference. First operand 230 states and 294 transitions. Second operand has 140 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:29,078 INFO L93 Difference]: Finished difference Result 464 states and 638 transitions. [2022-11-03 02:21:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-03 02:21:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-03 02:21:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:29,081 INFO L225 Difference]: With dead ends: 464 [2022-11-03 02:21:29,081 INFO L226 Difference]: Without dead ends: 281 [2022-11-03 02:21:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11320 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=8789, Invalid=14467, Unknown=0, NotChecked=0, Total=23256 [2022-11-03 02:21:29,084 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:29,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 53 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:21:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-03 02:21:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2022-11-03 02:21:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.2355072463768115) internal successors, (341), 276 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2022-11-03 02:21:29,211 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 84 [2022-11-03 02:21:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:29,212 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2022-11-03 02:21:29,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2022-11-03 02:21:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:21:29,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:29,214 INFO L195 NwaCegarLoop]: trace histogram [92, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:29,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:29,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:29,429 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1096016566, now seen corresponding path program 2 times [2022-11-03 02:21:29,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:29,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77268728] [2022-11-03 02:21:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:29,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:21:38,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77268728] [2022-11-03 02:21:38,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77268728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:38,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339872462] [2022-11-03 02:21:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:38,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:38,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:38,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:38,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:21:39,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:21:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:21:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:39,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 22 [2022-11-03 02:21:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4331 trivial. 0 not checked. [2022-11-03 02:21:39,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:40,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 26 [2022-11-03 02:21:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4331 trivial. 0 not checked. [2022-11-03 02:21:40,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339872462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141167718] [2022-11-03 02:21:40,698 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:21:40,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:40,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:40,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:40,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,786 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:21:40,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:21:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,881 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:21:40,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:21:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-11-03 02:21:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:40,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:41,037 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 02:21:41,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 366 treesize of output 334 [2022-11-03 02:21:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:41,121 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:21:41,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:21:41,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:41,347 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:21:41,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:21:41,628 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:41,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:41,754 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:21:41,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:21:41,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:41,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 95 treesize of output 88 [2022-11-03 02:21:41,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:21:42,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:44,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11426#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:44,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:44,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:44,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 11, 11] total 114 [2022-11-03 02:21:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981458409] [2022-11-03 02:21:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:44,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-03 02:21:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-03 02:21:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6082, Invalid=10174, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 02:21:44,800 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand has 115 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:36,484 INFO L93 Difference]: Finished difference Result 2428 states and 2891 transitions. [2022-11-03 02:22:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 418 states. [2022-11-03 02:22:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-03 02:22:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:36,493 INFO L225 Difference]: With dead ends: 2428 [2022-11-03 02:22:36,493 INFO L226 Difference]: Without dead ends: 2245 [2022-11-03 02:22:36,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103412 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=83179, Invalid=201443, Unknown=0, NotChecked=0, Total=284622 [2022-11-03 02:22:36,507 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6154 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 3657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6154 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3657 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:36,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6154 Valid, 653 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3657 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:22:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2022-11-03 02:22:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 450. [2022-11-03 02:22:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2672605790645879) internal successors, (569), 449 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 569 transitions. [2022-11-03 02:22:36,681 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 569 transitions. Word has length 131 [2022-11-03 02:22:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:36,681 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 569 transitions. [2022-11-03 02:22:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 569 transitions. [2022-11-03 02:22:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:22:36,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:36,683 INFO L195 NwaCegarLoop]: trace histogram [100, 7, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:36,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 02:22:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:22:36,883 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 171950972, now seen corresponding path program 7 times [2022-11-03 02:22:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81058520] [2022-11-03 02:22:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5139 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 02:22:46,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:46,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81058520] [2022-11-03 02:22:46,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81058520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:46,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175506350] [2022-11-03 02:22:46,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:22:46,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:46,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:46,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:22:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-03 02:22:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5139 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 02:22:53,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5139 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 02:23:08,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175506350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:08,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328599233] [2022-11-03 02:23:08,099 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:23:08,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:23:08,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:23:08,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:23:08,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:23:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,181 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-11-03 02:23:08,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 53 [2022-11-03 02:23:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,280 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 02:23:08,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:23:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:23:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:08,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,520 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 02:23:08,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 346 treesize of output 336 [2022-11-03 02:23:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,790 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 02:23:08,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 29 [2022-11-03 02:23:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:08,968 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:23:08,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-03 02:23:09,507 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:23:09,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:23:09,738 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 02:23:09,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:23:09,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:23:09,923 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:23:09,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 02:23:09,964 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:23:09,965 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-03 02:23:09,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2022-11-03 02:23:10,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:23:11,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17791#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:23:11,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:23:11,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:23:11,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2022-11-03 02:23:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207202159] [2022-11-03 02:23:11,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:23:11,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2022-11-03 02:23:11,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2022-11-03 02:23:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42363, Invalid=57809, Unknown=0, NotChecked=0, Total=100172 [2022-11-03 02:23:11,877 INFO L87 Difference]: Start difference. First operand 450 states and 569 transitions. Second operand has 305 states, 305 states have (on average 1.0524590163934426) internal successors, (321), 304 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:13,130 INFO L93 Difference]: Finished difference Result 904 states and 1243 transitions. [2022-11-03 02:23:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-11-03 02:23:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 305 states have (on average 1.0524590163934426) internal successors, (321), 304 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-03 02:23:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:13,134 INFO L225 Difference]: With dead ends: 904 [2022-11-03 02:23:13,135 INFO L226 Difference]: Without dead ends: 556 [2022-11-03 02:23:13,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46869 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=42363, Invalid=57809, Unknown=0, NotChecked=0, Total=100172 [2022-11-03 02:23:13,141 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:13,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:23:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-03 02:23:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 552. [2022-11-03 02:23:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.2177858439201452) internal successors, (671), 551 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 671 transitions. [2022-11-03 02:23:13,355 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 671 transitions. Word has length 140 [2022-11-03 02:23:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:13,355 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 671 transitions. [2022-11-03 02:23:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 305 states have (on average 1.0524590163934426) internal successors, (321), 304 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 671 transitions. [2022-11-03 02:23:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-03 02:23:13,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:13,359 INFO L195 NwaCegarLoop]: trace histogram [202, 7, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:13,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:13,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:23:13,574 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1143526812, now seen corresponding path program 8 times [2022-11-03 02:23:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97476516] [2022-11-03 02:23:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20503 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 02:23:46,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:46,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97476516] [2022-11-03 02:23:46,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97476516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:46,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652636626] [2022-11-03 02:23:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:23:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:46,904 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:46,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c32796-7ef8-4a47-b2e8-9fc16184907c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:23:47,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:23:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:23:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:48,928 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:23:48,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 24 treesize of output 29 [2022-11-03 02:23:49,104 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:23:49,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-03 02:23:49,290 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:23:49,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-03 02:23:49,472 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:23:49,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-03 02:23:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 20569 trivial. 0 not checked. [2022-11-03 02:23:50,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:53,564 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7519 Int) (v_ArrVal_7516 Int) (|v_ULTIMATE.start_main_~i~1#1_797| Int) (v_ArrVal_7514 Int) (|v_ULTIMATE.start_main_~i~1#1_796| Int) (v_ArrVal_7512 Int) (|v_ULTIMATE.start_main_~i~1#1_795| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (or (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_7512) (+ |c_ULTIMATE.start_main_~#set~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_797|)) v_ArrVal_7514) (+ |c_ULTIMATE.start_main_~#set~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_796|)) v_ArrVal_7516) (+ |c_ULTIMATE.start_main_~#set~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_795|)) v_ArrVal_7519) |c_ULTIMATE.start_main_~#set~0#1.offset|))) (not (<= |v_ULTIMATE.start_main_~i~1#1_796| (+ 1 |v_ULTIMATE.start_main_~i~1#1_797|))) (< (+ 2 |v_ULTIMATE.start_main_~i~1#1_795|) c_~SIZE~0) (not (<= |v_ULTIMATE.start_main_~i~1#1_795| (+ 1 |v_ULTIMATE.start_main_~i~1#1_796|))) (not (<= |v_ULTIMATE.start_main_~i~1#1_797| (+ |ULTIMATE.start_main_~i~1#1| 1))))) is different from false [2022-11-03 02:23:55,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 [2022-11-03 02:23:55,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:23:55,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11826 treesize of output 8700