./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc --- 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-8393723 [2022-11-19 08:04:09,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:04:09,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:04:09,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:04:09,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:04:09,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:04:09,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:04:09,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:04:09,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:04:09,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:04:09,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:04:09,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:04:09,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:04:09,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:04:09,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:04:09,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:04:09,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:04:09,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:04:09,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:04:09,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:04:09,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:04:09,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:04:09,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:04:09,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:04:09,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:04:09,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:04:09,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:04:09,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:04:09,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:04:09,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:04:09,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:04:09,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:04:09,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:04:09,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:04:09,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:04:09,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:04:09,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:04:09,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:04:09,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:04:09,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:04:09,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:04:09,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:04:09,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:04:09,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:04:09,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:04:09,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:04:09,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:04:09,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:04:09,684 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:04:09,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:04:09,684 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:04:09,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:04:09,685 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:04:09,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:04:09,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:04:09,686 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:04:09,686 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:04:09,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:04:09,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:04:09,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:04:09,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:04:09,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:04:09,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:04:09,690 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:04:09,690 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:04:09,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:04:09,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:04:09,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:04:09,691 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:04:09,691 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:04:09,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:04:09,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:04:09,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:04:09,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:04:09,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:04:09,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:04:09,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:04:09,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:09,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:04:09,693 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:04:09,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:04:09,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:04:09,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:04:09,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:04:09,694 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_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc [2022-11-19 08:04:09,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:04:09,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:04:09,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:04:09,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:04:10,000 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:04:10,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2022-11-19 08:04:10,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/data/268f2d573/2ed5b35834c24a3a92c7e64f6d4166eb/FLAG44c76ff82 [2022-11-19 08:04:10,616 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:04:10,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2022-11-19 08:04:10,637 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/data/268f2d573/2ed5b35834c24a3a92c7e64f6d4166eb/FLAG44c76ff82 [2022-11-19 08:04:10,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/data/268f2d573/2ed5b35834c24a3a92c7e64f6d4166eb [2022-11-19 08:04:10,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:04:10,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:04:10,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:10,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:04:10,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:04:10,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74087d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:10, skipping insertion in model container [2022-11-19 08:04:10,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:10" (1/1) ... [2022-11-19 08:04:10,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:04:10,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:04:11,404 WARN L234 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_78968adc-bd4a-47c1-a048-2ddb51a36b8b/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2022-11-19 08:04:11,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:11,425 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:04:11,480 WARN L234 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_78968adc-bd4a-47c1-a048-2ddb51a36b8b/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2022-11-19 08:04:11,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:11,509 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:04:11,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11 WrapperNode [2022-11-19 08:04:11,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:11,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:11,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:04:11,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:04:11,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,587 INFO L138 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2022-11-19 08:04:11,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:11,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:04:11,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:04:11,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:04:11,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:04:11,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:04:11,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:04:11,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:04:11,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (1/1) ... [2022-11-19 08:04:11,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:11,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:04:11,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:04:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:04:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:04:11,737 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-19 08:04:11,737 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-19 08:04:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:04:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:04:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:04:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:04:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:04:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:04:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:04:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:04:11,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:04:11,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:04:11,916 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:04:11,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:04:12,404 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:04:12,454 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:04:12,467 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 08:04:12,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:12 BoogieIcfgContainer [2022-11-19 08:04:12,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:04:12,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:04:12,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:04:12,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:04:12,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:10" (1/3) ... [2022-11-19 08:04:12,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259e8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:12, skipping insertion in model container [2022-11-19 08:04:12,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:11" (2/3) ... [2022-11-19 08:04:12,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259e8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:12, skipping insertion in model container [2022-11-19 08:04:12,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:12" (3/3) ... [2022-11-19 08:04:12,482 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2022-11-19 08:04:12,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:04:12,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2022-11-19 08:04:12,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:04:12,566 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3926a24b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:04:12,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-19 08:04:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 112 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:04:12,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:12,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:04:12,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 224857692, now seen corresponding path program 1 times [2022-11-19 08:04:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:12,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208511224] [2022-11-19 08:04:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:12,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208511224] [2022-11-19 08:04:12,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208511224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:12,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:12,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:04:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128305636] [2022-11-19 08:04:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:12,868 INFO L87 Difference]: Start difference. First operand has 117 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 112 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:13,011 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2022-11-19 08:04:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:04:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:13,022 INFO L225 Difference]: With dead ends: 114 [2022-11-19 08:04:13,022 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 08:04:13,028 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 [2022-11-19 08:04:13,037 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:13,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 156 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 08:04:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-19 08:04:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 51 states have (on average 2.235294117647059) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-11-19 08:04:13,082 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 5 [2022-11-19 08:04:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:13,083 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-11-19 08:04:13,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-11-19 08:04:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:04:13,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:13,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:04:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:04:13,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash 224857693, now seen corresponding path program 1 times [2022-11-19 08:04:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:13,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178066999] [2022-11-19 08:04:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:13,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:13,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178066999] [2022-11-19 08:04:13,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178066999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:13,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:13,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:04:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985943801] [2022-11-19 08:04:13,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:13,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:13,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:13,251 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:13,389 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-11-19 08:04:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:04:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:13,391 INFO L225 Difference]: With dead ends: 109 [2022-11-19 08:04:13,391 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 08:04:13,392 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 [2022-11-19 08:04:13,393 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:13,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 161 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 08:04:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-19 08:04:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 51 states have (on average 2.176470588235294) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2022-11-19 08:04:13,403 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 5 [2022-11-19 08:04:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:13,404 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2022-11-19 08:04:13,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:04:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2022-11-19 08:04:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:04:13,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:13,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:13,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:04:13,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash -767355401, now seen corresponding path program 1 times [2022-11-19 08:04:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:13,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947921335] [2022-11-19 08:04:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:13,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:13,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947921335] [2022-11-19 08:04:13,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947921335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:13,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981503123] [2022-11-19 08:04:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:13,572 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:04:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:13,628 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2022-11-19 08:04:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 08:04:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:13,632 INFO L225 Difference]: With dead ends: 120 [2022-11-19 08:04:13,632 INFO L226 Difference]: Without dead ends: 120 [2022-11-19 08:04:13,632 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 [2022-11-19 08:04:13,633 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:13,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 203 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:04:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-19 08:04:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-11-19 08:04:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 105 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2022-11-19 08:04:13,654 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 11 [2022-11-19 08:04:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:13,654 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2022-11-19 08:04:13,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:04:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2022-11-19 08:04:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:04:13,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:13,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:13,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:04:13,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2090414090, now seen corresponding path program 1 times [2022-11-19 08:04:13,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:13,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261814310] [2022-11-19 08:04:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:13,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:04:13,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261814310] [2022-11-19 08:04:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261814310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:13,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:13,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20974297] [2022-11-19 08:04:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:13,882 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:14,166 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2022-11-19 08:04:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-19 08:04:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:14,169 INFO L225 Difference]: With dead ends: 110 [2022-11-19 08:04:14,169 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 08:04:14,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:04:14,170 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:14,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 292 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:04:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 08:04:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-11-19 08:04:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2022-11-19 08:04:14,187 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 19 [2022-11-19 08:04:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:14,188 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2022-11-19 08:04:14,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2022-11-19 08:04:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:04:14,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:14,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:04:14,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2090414091, now seen corresponding path program 1 times [2022-11-19 08:04:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:14,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160822341] [2022-11-19 08:04:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:14,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160822341] [2022-11-19 08:04:14,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160822341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:14,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:14,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622100937] [2022-11-19 08:04:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:14,555 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:14,798 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-11-19 08:04:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-19 08:04:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:14,800 INFO L225 Difference]: With dead ends: 109 [2022-11-19 08:04:14,800 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 08:04:14,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:04:14,801 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 16 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:14,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 316 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:04:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 08:04:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-11-19 08:04:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 103 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2022-11-19 08:04:14,808 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 19 [2022-11-19 08:04:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:14,809 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2022-11-19 08:04:14,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2022-11-19 08:04:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:04:14,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:14,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:04:14,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1156754325, now seen corresponding path program 1 times [2022-11-19 08:04:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120557812] [2022-11-19 08:04:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:15,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120557812] [2022-11-19 08:04:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120557812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127135893] [2022-11-19 08:04:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:15,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:15,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:04:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:04:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:15,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:15,416 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_212 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_212))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-19 08:04:15,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:15,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:04:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-19 08:04:15,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127135893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074917925] [2022-11-19 08:04:15,669 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:04:15,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:15,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:15,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:15,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:04:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:15,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:15,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:15,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:15,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:15,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:15,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:04:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:15,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:15,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:04:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:15,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:16,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:16,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:16,332 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:16,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:16,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:16,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:16,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:16,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:16,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:16,692 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:16,694 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:16,801 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:17,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:17,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:17,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:17,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:17,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:17,127 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:17,129 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:17,132 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:17,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:04:17,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:17,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:17,367 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:17,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:17,552 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-19 08:04:18,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:23,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1342#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:23,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:23,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:04:23,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-19 08:04:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084821987] [2022-11-19 08:04:23,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:04:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:04:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=433, Unknown=2, NotChecked=42, Total=552 [2022-11-19 08:04:23,838 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:04:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:24,272 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-11-19 08:04:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:24,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-19 08:04:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:24,274 INFO L225 Difference]: With dead ends: 115 [2022-11-19 08:04:24,274 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 08:04:24,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=90, Invalid=512, Unknown=2, NotChecked=46, Total=650 [2022-11-19 08:04:24,275 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 3 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:24,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 369 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 378 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-11-19 08:04:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 08:04:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-11-19 08:04:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 107 states have internal predecessors, (116), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2022-11-19 08:04:24,282 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 21 [2022-11-19 08:04:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:24,282 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2022-11-19 08:04:24,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:04:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2022-11-19 08:04:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:04:24,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:24,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:24,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:24,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:24,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1156754324, now seen corresponding path program 1 times [2022-11-19 08:04:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173899775] [2022-11-19 08:04:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:24,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173899775] [2022-11-19 08:04:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173899775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531872712] [2022-11-19 08:04:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:24,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:24,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:24,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:04:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:04:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:25,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:25,159 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_313 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_313))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-19 08:04:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:04:25,205 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:25,206 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-19 08:04:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-19 08:04:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:25,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531872712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978822350] [2022-11-19 08:04:25,635 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:04:25,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:25,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:25,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:25,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:04:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:25,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:25,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:25,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:25,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:25,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:25,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:04:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:25,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:04:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:25,944 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:25,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:25,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:25,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:26,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:26,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:26,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:26,081 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:26,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:26,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:26,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:26,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:26,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:26,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:26,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:26,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:26,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:04:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:26,316 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:26,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:26,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:26,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:26,356 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-19 08:04:26,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:32,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1682#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:32,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:32,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:04:32,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-19 08:04:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167444253] [2022-11-19 08:04:32,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:32,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:04:32,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:04:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=764, Unknown=1, NotChecked=56, Total=930 [2022-11-19 08:04:32,153 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:32,837 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-11-19 08:04:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:04:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 08:04:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:32,838 INFO L225 Difference]: With dead ends: 115 [2022-11-19 08:04:32,839 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 08:04:32,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=131, Invalid=864, Unknown=1, NotChecked=60, Total=1056 [2022-11-19 08:04:32,840 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 14 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:32,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 472 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 677 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-11-19 08:04:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 08:04:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-11-19 08:04:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 107 states have internal predecessors, (115), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-11-19 08:04:32,846 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 21 [2022-11-19 08:04:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:32,846 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-11-19 08:04:32,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-11-19 08:04:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:04:32,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:32,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:32,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:33,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 755783828, now seen corresponding path program 1 times [2022-11-19 08:04:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:33,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664739308] [2022-11-19 08:04:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:33,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:33,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664739308] [2022-11-19 08:04:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664739308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466919060] [2022-11-19 08:04:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:33,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:04:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:04:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:33,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:33,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466919060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:33,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723212214] [2022-11-19 08:04:33,340 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 08:04:33,340 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:33,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:33,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:33,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:04:33,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:33,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:33,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:33,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:33,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:33,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:33,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:33,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:04:33,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:04:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:33,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:33,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:33,754 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:33,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:33,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:33,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:33,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:33,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:34,019 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,021 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,101 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:34,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:04:34,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-19 08:04:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:04:34,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:34,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-19 08:04:34,404 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,406 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,408 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,410 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:34,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:04:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:34,588 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:34,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:34,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:34,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:34,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:34,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:34,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:34,865 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,867 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,870 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:34,946 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:34,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:35,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:35,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:35,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:35,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:35,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:35,227 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:35,229 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:35,231 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:35,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-19 08:04:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:35,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:35,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-19 08:04:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:35,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:35,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:35,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-19 08:04:35,523 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:04:35,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:04:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:35,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:35,747 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-19 08:04:36,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:41,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1723212214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:41,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:41,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 17 [2022-11-19 08:04:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292258928] [2022-11-19 08:04:41,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:41,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:04:41,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:41,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:04:41,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:04:41,615 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:04:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:42,612 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-11-19 08:04:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:04:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-19 08:04:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:42,614 INFO L225 Difference]: With dead ends: 119 [2022-11-19 08:04:42,614 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 08:04:42,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:04:42,615 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:42,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 320 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 455 Unchecked, 1.0s Time] [2022-11-19 08:04:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 08:04:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-19 08:04:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 112 states have internal predecessors, (119), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-11-19 08:04:42,621 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 23 [2022-11-19 08:04:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:42,622 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-11-19 08:04:42,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:04:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-11-19 08:04:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:04:42,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:42,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:42,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:42,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:42,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1949490875, now seen corresponding path program 1 times [2022-11-19 08:04:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716900689] [2022-11-19 08:04:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:42,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716900689] [2022-11-19 08:04:42,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716900689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291023619] [2022-11-19 08:04:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:42,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:42,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:42,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:42,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:04:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:04:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:43,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:43,075 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:04:43,075 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2022-11-19 08:04:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:43,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291023619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795194056] [2022-11-19 08:04:43,095 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:04:43,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:43,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:43,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:43,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:04:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:43,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:43,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:43,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:43,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:43,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:43,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:04:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:43,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:04:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:43,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,363 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:43,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:43,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:43,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:43,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:43,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:43,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:43,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,474 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:43,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:43,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:43,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:43,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:43,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:43,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:43,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:43,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:04:43,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:43,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:43,677 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:43,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:04:43,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:43,708 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:04:43,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:04:43,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:04:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:43,788 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:04:43,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:04:43,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:43,815 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:04:43,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:04:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:04:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:43,934 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:43,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:43,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:43,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:43,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:44,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:44,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:44,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:44,065 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:44,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:44,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:44,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:44,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:44,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:44,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:44,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:44,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:04:44,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:04:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:44,297 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:44,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:44,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:44,332 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-19 08:04:44,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:50,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2456#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:50,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:50,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:50,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-19 08:04:50,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428539390] [2022-11-19 08:04:50,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:50,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2022-11-19 08:04:50,336 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:04:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:50,549 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2022-11-19 08:04:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-19 08:04:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:50,550 INFO L225 Difference]: With dead ends: 124 [2022-11-19 08:04:50,550 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 08:04:50,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=72, Invalid=387, Unknown=3, NotChecked=0, Total=462 [2022-11-19 08:04:50,551 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:50,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 288 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 08:04:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-19 08:04:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 115 states have internal predecessors, (124), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2022-11-19 08:04:50,566 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 24 [2022-11-19 08:04:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:50,567 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2022-11-19 08:04:50,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:04:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2022-11-19 08:04:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:04:50,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:50,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:50,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:04:50,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:50,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:04:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1949490876, now seen corresponding path program 1 times [2022-11-19 08:04:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753255450] [2022-11-19 08:04:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:51,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753255450] [2022-11-19 08:04:51,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753255450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:51,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102636398] [2022-11-19 08:04:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:51,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:51,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:51,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:51,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:04:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:04:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:51,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:51,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:04:51,287 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 24 [2022-11-19 08:04:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:04:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102636398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:51,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282649699] [2022-11-19 08:04:51,413 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:04:51,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:51,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:51,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:51,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:04:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:51,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:04:51,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:51,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:51,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:51,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:51,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:04:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:04:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:51,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:04:51,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:04:51,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:51,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:04:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,678 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:51,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:51,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:51,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:51,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:51,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:51,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,782 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:51,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:51,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:51,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:51,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:51,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:51,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:51,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:51,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-19 08:04:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-19 08:04:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-19 08:04:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:04:52,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,180 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:04:52,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:04:52,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,207 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:04:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-19 08:04:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:04:52,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,468 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:04:52,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-19 08:04:52,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:52,501 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:04:52,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:04:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,729 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:52,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:52,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:52,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:52,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:52,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:52,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:52,861 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:52,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:52,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:04:52,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:04:52,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:04:53,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:53,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:04:53,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:04:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:53,043 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:04:53,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:04:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:53,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:04:53,079 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-19 08:04:53,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:59,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2874#(and (< (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:59,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:59,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:59,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-19 08:04:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326265945] [2022-11-19 08:04:59,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:04:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:04:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:04:59,597 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 08:04:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:59,959 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-11-19 08:04:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:04:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2022-11-19 08:04:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:59,961 INFO L225 Difference]: With dead ends: 127 [2022-11-19 08:04:59,961 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 08:04:59,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:04:59,962 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 23 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:59,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 825 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:04:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 08:04:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-11-19 08:04:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.921875) internal successors, (123), 115 states have internal predecessors, (123), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-11-19 08:04:59,968 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 24 [2022-11-19 08:04:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:59,968 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-11-19 08:04:59,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 08:04:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-11-19 08:04:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:04:59,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:59,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:05:00,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 304674986, now seen corresponding path program 1 times [2022-11-19 08:05:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128551232] [2022-11-19 08:05:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:00,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128551232] [2022-11-19 08:05:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128551232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:00,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:00,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926235184] [2022-11-19 08:05:00,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:00,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:00,281 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:05:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:00,511 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2022-11-19 08:05:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:00,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-19 08:05:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:00,512 INFO L225 Difference]: With dead ends: 122 [2022-11-19 08:05:00,512 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 08:05:00,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:05:00,513 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 19 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:00,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 332 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 08:05:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-11-19 08:05:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.90625) internal successors, (122), 114 states have internal predecessors, (122), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-11-19 08:05:00,518 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 25 [2022-11-19 08:05:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:00,518 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-11-19 08:05:00,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:05:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-11-19 08:05:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:05:00,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:00,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:05:00,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 304674987, now seen corresponding path program 1 times [2022-11-19 08:05:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703006407] [2022-11-19 08:05:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:00,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:00,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703006407] [2022-11-19 08:05:00,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703006407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:00,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:00,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:05:00,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875853033] [2022-11-19 08:05:00,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:00,727 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:05:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:00,974 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2022-11-19 08:05:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-19 08:05:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:00,976 INFO L225 Difference]: With dead ends: 120 [2022-11-19 08:05:00,976 INFO L226 Difference]: Without dead ends: 120 [2022-11-19 08:05:00,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:05:00,977 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:00,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 362 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-19 08:05:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-19 08:05:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.890625) internal successors, (121), 113 states have internal predecessors, (121), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2022-11-19 08:05:00,981 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 25 [2022-11-19 08:05:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:00,982 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2022-11-19 08:05:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:05:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2022-11-19 08:05:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:05:00,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:00,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:05:00,984 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash 427612307, now seen corresponding path program 1 times [2022-11-19 08:05:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:00,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749830948] [2022-11-19 08:05:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:01,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749830948] [2022-11-19 08:05:01,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749830948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362331417] [2022-11-19 08:05:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:01,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:01,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:01,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:05:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:05:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:01,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:01,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:05:01,750 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_922 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_922))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-19 08:05:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:01,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:05:01,795 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_923 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_923))) is different from true [2022-11-19 08:05:01,805 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_923 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_923))) is different from true [2022-11-19 08:05:01,817 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:05:01,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:05:01,875 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2022-11-19 08:05:01,892 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:05:01,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:05:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-11-19 08:05:01,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:02,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362331417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727060307] [2022-11-19 08:05:02,321 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 08:05:02,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:02,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:02,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:02,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:05:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:02,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:02,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:02,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:02,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:02,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:02,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:02,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:02,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:02,677 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:02,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:05:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-19 08:05:02,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-19 08:05:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:02,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:05:02,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:02,951 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:02,954 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:02,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:03,026 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:03,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:03,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:03,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:03,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:03,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:03,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:03,280 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:03,283 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:03,284 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:03,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-19 08:05:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-19 08:05:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-19 08:05:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:05:03,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,566 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:05:03,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:05:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,598 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:05:03,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-19 08:05:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:05:03,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,806 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:05:03,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-19 08:05:03,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:03,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:03,838 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:05:03,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:05:03,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:03,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:03,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:04,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:04,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:04,165 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:04,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:04,184 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:04,210 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:04,232 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,232 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:04,362 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:04,381 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,382 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:04,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:04,403 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:04,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:04,429 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:04,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:04,630 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:04,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:04,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:04,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:04,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:04,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:04,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:04,825 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:04,826 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:04,828 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:04,908 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:04,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:05,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:05,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:05,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:05,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:05,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:05,155 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:05,159 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:05,161 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:05,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:05,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:05,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:05,325 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:05,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:05,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:05,465 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-19 08:05:05,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:05,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:05,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:05,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:05,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:05,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:05,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:05,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:05,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:10,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3855#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1)) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:10,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:10,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:05:10,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-11-19 08:05:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641060306] [2022-11-19 08:05:10,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:10,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:05:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:05:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1478, Unknown=4, NotChecked=324, Total=1980 [2022-11-19 08:05:10,268 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 19 states, 14 states have (on average 3.357142857142857) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:10,799 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-11-19 08:05:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:05:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 3.357142857142857) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2022-11-19 08:05:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:10,801 INFO L225 Difference]: With dead ends: 130 [2022-11-19 08:05:10,801 INFO L226 Difference]: Without dead ends: 130 [2022-11-19 08:05:10,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=207, Invalid=1697, Unknown=4, NotChecked=348, Total=2256 [2022-11-19 08:05:10,802 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 237 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:10,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 379 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 531 Invalid, 0 Unknown, 409 Unchecked, 0.4s Time] [2022-11-19 08:05:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-19 08:05:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 113. [2022-11-19 08:05:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.78125) internal successors, (114), 106 states have internal predecessors, (114), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2022-11-19 08:05:10,810 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 34 [2022-11-19 08:05:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:10,811 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2022-11-19 08:05:10,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 3.357142857142857) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2022-11-19 08:05:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:05:10,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:10,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:10,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:11,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:11,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 427612308, now seen corresponding path program 1 times [2022-11-19 08:05:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799982795] [2022-11-19 08:05:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:05:11,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799982795] [2022-11-19 08:05:11,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799982795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314739140] [2022-11-19 08:05:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:11,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:11,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:11,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:05:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:05:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:11,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:05:11,855 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1105 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1105) |c_#length|)))) is different from true [2022-11-19 08:05:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:11,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:05:11,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:05:11,912 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1106 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1106) |c_#length|)))) is different from true [2022-11-19 08:05:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:11,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:05:12,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:05:12,011 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1107 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1107))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-19 08:05:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:05:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-11-19 08:05:12,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:12,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314739140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886200121] [2022-11-19 08:05:12,144 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 08:05:12,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:12,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:12,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:12,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:05:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:12,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:12,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:12,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:12,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:12,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:12,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:12,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:12,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,399 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:12,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:12,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:12,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:12,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:12,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:12,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,495 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:12,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:12,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:12,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:12,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:12,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:12,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:12,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:12,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:12,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:05:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:12,716 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:12,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:12,745 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:12,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:12,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:12,842 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:12,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:12,870 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:12,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:12,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:12,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:12,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:12,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:12,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:12,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:13,199 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:13,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:13,219 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:13,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:13,239 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:13,260 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,260 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:13,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:13,368 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:13,385 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,385 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:13,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:13,404 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:13,433 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:13,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,522 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:13,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:13,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:13,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:13,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:13,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:13,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,618 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:13,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:13,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:13,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:13,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:13,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:13,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:13,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:05:13,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:13,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:13,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:13,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:13,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:13,866 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 08:05:13,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:13,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:13,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:13,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:14,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:14,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:14,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:14,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:17,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4249#(and (<= |ULTIMATE.start_dll_circular_append_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_append_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_append_~head#1.base|) (<= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| 0) (< (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|) (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= 1 |ULTIMATE.start_dll_circular_append_~data#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_dll_circular_append_#in~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:17,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:17,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:05:17,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-11-19 08:05:17,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507168453] [2022-11-19 08:05:17,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:17,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:05:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:05:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=953, Unknown=3, NotChecked=192, Total=1260 [2022-11-19 08:05:17,717 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 15 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:18,189 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-11-19 08:05:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2022-11-19 08:05:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:18,190 INFO L225 Difference]: With dead ends: 122 [2022-11-19 08:05:18,190 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 08:05:18,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=134, Invalid=1135, Unknown=3, NotChecked=210, Total=1482 [2022-11-19 08:05:18,192 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 224 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:18,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 195 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 405 Invalid, 0 Unknown, 333 Unchecked, 0.4s Time] [2022-11-19 08:05:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 08:05:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-11-19 08:05:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.65625) internal successors, (106), 98 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2022-11-19 08:05:18,196 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 34 [2022-11-19 08:05:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:18,196 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2022-11-19 08:05:18,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2022-11-19 08:05:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:05:18,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:18,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:18,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:18,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:05:18,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1459881937, now seen corresponding path program 1 times [2022-11-19 08:05:18,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:18,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931960052] [2022-11-19 08:05:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:05:18,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931960052] [2022-11-19 08:05:18,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931960052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644541803] [2022-11-19 08:05:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:18,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:18,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:18,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:18,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:05:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:05:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:05:18,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:05:18,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644541803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:18,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:05:18,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 08:05:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586096565] [2022-11-19 08:05:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:05:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:05:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:05:18,753 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:05:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:18,784 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-19 08:05:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:05:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-19 08:05:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:18,785 INFO L225 Difference]: With dead ends: 93 [2022-11-19 08:05:18,785 INFO L226 Difference]: Without dead ends: 93 [2022-11-19 08:05:18,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:05:18,788 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 148 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 90 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 [2022-11-19 08:05:18,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 90 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:05:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-19 08:05:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-19 08:05:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 87 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2022-11-19 08:05:18,793 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 34 [2022-11-19 08:05:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:18,793 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2022-11-19 08:05:18,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:05:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2022-11-19 08:05:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:05:18,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:18,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:18,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:19,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:05:19,002 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1381432812, now seen corresponding path program 1 times [2022-11-19 08:05:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:19,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722447341] [2022-11-19 08:05:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:05:19,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:19,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722447341] [2022-11-19 08:05:19,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722447341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:19,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:19,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:05:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43838267] [2022-11-19 08:05:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:05:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:05:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:05:19,121 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:05:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:19,285 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-11-19 08:05:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:05:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-19 08:05:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:19,287 INFO L225 Difference]: With dead ends: 106 [2022-11-19 08:05:19,287 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 08:05:19,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:19,287 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:19,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 170 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 08:05:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2022-11-19 08:05:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.543859649122807) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-11-19 08:05:19,296 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 36 [2022-11-19 08:05:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:19,297 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-11-19 08:05:19,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:05:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-11-19 08:05:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:05:19,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:19,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:05:19,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1381432811, now seen corresponding path program 1 times [2022-11-19 08:05:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:19,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042779923] [2022-11-19 08:05:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:05:19,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042779923] [2022-11-19 08:05:19,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042779923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:19,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:19,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:05:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734791225] [2022-11-19 08:05:19,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:19,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:05:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:05:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:05:19,559 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:05:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:19,710 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-11-19 08:05:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:05:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-19 08:05:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:19,711 INFO L225 Difference]: With dead ends: 85 [2022-11-19 08:05:19,711 INFO L226 Difference]: Without dead ends: 85 [2022-11-19 08:05:19,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:05:19,712 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 61 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:19,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 187 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-19 08:05:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-19 08:05:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2022-11-19 08:05:19,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 36 [2022-11-19 08:05:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:19,715 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2022-11-19 08:05:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:05:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2022-11-19 08:05:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:05:19,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:19,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:19,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:05:19,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 125266733, now seen corresponding path program 1 times [2022-11-19 08:05:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:19,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959044278] [2022-11-19 08:05:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:20,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959044278] [2022-11-19 08:05:20,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959044278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524648036] [2022-11-19 08:05:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:20,398 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:20,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:05:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:20,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 08:05:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:20,802 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 5 [2022-11-19 08:05:20,951 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1615 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1615))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1618 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1618))))) is different from true [2022-11-19 08:05:20,989 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-19 08:05:20,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:05:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:20,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 08:05:21,039 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-19 08:05:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:05:21,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:05:21,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524648036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:21,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:05:21,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-19 08:05:21,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049609945] [2022-11-19 08:05:21,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:21,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:05:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:05:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=402, Unknown=2, NotChecked=40, Total=506 [2022-11-19 08:05:21,063 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:05:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:21,299 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-11-19 08:05:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:05:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-19 08:05:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:21,301 INFO L225 Difference]: With dead ends: 84 [2022-11-19 08:05:21,301 INFO L226 Difference]: Without dead ends: 84 [2022-11-19 08:05:21,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=514, Unknown=2, NotChecked=46, Total=650 [2022-11-19 08:05:21,302 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:21,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 275 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-11-19 08:05:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-19 08:05:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-19 08:05:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.456140350877193) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-11-19 08:05:21,305 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 37 [2022-11-19 08:05:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:21,306 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-11-19 08:05:21,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:05:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-11-19 08:05:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:05:21,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:21,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:21,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:21,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:05:21,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash 125266734, now seen corresponding path program 1 times [2022-11-19 08:05:21,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642867841] [2022-11-19 08:05:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:21,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642867841] [2022-11-19 08:05:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642867841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533358206] [2022-11-19 08:05:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:22,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:22,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:22,899 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:22,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:05:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:05:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:23,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:23,509 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2022-11-19 08:05:23,514 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2022-11-19 08:05:23,753 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1792 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1792) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1798 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1798))) (exists ((v_ArrVal_1797 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1797))))) is different from true [2022-11-19 08:05:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:23,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-19 08:05:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:23,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-19 08:05:23,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:23,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 08:05:23,792 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 08:05:23,792 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2022-11-19 08:05:23,860 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 15 [2022-11-19 08:05:23,862 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 16 [2022-11-19 08:05:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 08:05:23,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:24,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533358206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491942119] [2022-11-19 08:05:24,218 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 08:05:24,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:24,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:24,219 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:24,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:05:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:24,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:24,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:24,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:24,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:24,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:24,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:24,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:24,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:24,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,501 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:24,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:24,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:24,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:24,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:24,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,604 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:24,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:24,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:24,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:24,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:24,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:24,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:24,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:24,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:05:24,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,786 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:24,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,812 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:24,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,897 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:24,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:24,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,960 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:25,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:25,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:25,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:25,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:25,203 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,204 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:25,228 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:25,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:25,253 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:25,280 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:25,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:25,372 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:25,390 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,390 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:25,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:25,414 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:25,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:25,439 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:25,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,662 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:25,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:25,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:25,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:25,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:25,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:25,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,764 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:25,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:25,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:25,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:25,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:25,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:25,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:25,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:25,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:25,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,972 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:25,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:25,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:26,009 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2022-11-19 08:05:26,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:26,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:26,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:26,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:26,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:26,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:26,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:26,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:26,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:32,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5634#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (or (not (<= (+ |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| 8) (select |#length| |ULTIMATE.start_dll_circular_append_#t~mem11#1.base|))) (not (<= 0 (+ |ULTIMATE.start_dll_circular_append_#t~mem11#1.offset| 4)))) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) |ULTIMATE.start_dll_circular_append_#t~mem11#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:32,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:32,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:05:32,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-19 08:05:32,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174412368] [2022-11-19 08:05:32,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:32,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 08:05:32,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 08:05:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2532, Unknown=2, NotChecked=102, Total=2862 [2022-11-19 08:05:32,971 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 08:05:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:34,262 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-19 08:05:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:05:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-19 08:05:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:34,264 INFO L225 Difference]: With dead ends: 83 [2022-11-19 08:05:34,264 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 08:05:34,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=304, Invalid=3478, Unknown=4, NotChecked=120, Total=3906 [2022-11-19 08:05:34,265 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:34,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 673 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 712 Invalid, 0 Unknown, 170 Unchecked, 0.7s Time] [2022-11-19 08:05:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 08:05:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-19 08:05:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-11-19 08:05:34,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 37 [2022-11-19 08:05:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:34,269 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-11-19 08:05:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 08:05:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-11-19 08:05:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:05:34,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:34,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:34,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:34,471 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash -411694041, now seen corresponding path program 1 times [2022-11-19 08:05:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:34,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293832045] [2022-11-19 08:05:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:36,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293832045] [2022-11-19 08:05:36,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293832045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433545510] [2022-11-19 08:05:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:36,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:36,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:36,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:05:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 08:05:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:36,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:36,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 08:05:36,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:36,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 14 [2022-11-19 08:05:36,772 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-19 08:05:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,995 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 08:05:36,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 08:05:37,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:05:37,038 INFO L321 Elim1Store]: treesize reduction 96, result has 30.9 percent of original size [2022-11-19 08:05:37,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 36 treesize of output 52 [2022-11-19 08:05:37,187 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-11-19 08:05:37,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:37,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 25 [2022-11-19 08:05:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:05:37,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:37,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433545510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:37,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646674124] [2022-11-19 08:05:37,561 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:05:37,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:37,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:37,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:37,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:05:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:37,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:37,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:37,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:37,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:37,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:37,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:37,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:37,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:37,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:37,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:37,895 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:37,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:38,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:38,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:38,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:38,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:38,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:38,055 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,056 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,059 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,125 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:38,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:38,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:38,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:05:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:05:38,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-19 08:05:38,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-19 08:05:38,305 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,307 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,308 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:38,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:38,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:05:38,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:05:38,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,445 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:38,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,471 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:38,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,521 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:05:38,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:05:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:05:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,565 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:05:38,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:38,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:38,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:38,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:38,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:38,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,887 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:38,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:38,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:38,909 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:38,935 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:38,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:38,951 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:38,952 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:39,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:39,063 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:39,083 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:39,083 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:39,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:39,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:39,105 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:39,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:39,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:39,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:39,126 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:39,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:39,338 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:39,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:39,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:39,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:39,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:39,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:39,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:39,558 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,561 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,563 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,623 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:39,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:39,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:39,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:39,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:39,847 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,850 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,852 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:39,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:39,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:39,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:40,026 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:05:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:05:40,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:40,207 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 08:05:40,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:40,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:40,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:40,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:40,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:40,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:40,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:40,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:49,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6006#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) 1) (= |ULTIMATE.start_dll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)))) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) |ULTIMATE.start_dll_circular_append_~last~1#1.offset|) (<= (+ 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (<= |#NULL.offset| 0) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (<= 0 (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (<= 0 |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (<= 0 |#NULL.offset|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_append_~last~1#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:49,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:49,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:05:49,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-11-19 08:05:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554046409] [2022-11-19 08:05:49,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:05:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:05:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2950, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 08:05:49,307 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 30 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:05:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:50,471 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-11-19 08:05:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:05:50,472 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-11-19 08:05:50,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:50,473 INFO L225 Difference]: With dead ends: 82 [2022-11-19 08:05:50,473 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 08:05:50,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=349, Invalid=4073, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 08:05:50,474 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 32 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:50,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 518 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 595 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-19 08:05:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 08:05:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-19 08:05:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-19 08:05:50,478 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 38 [2022-11-19 08:05:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:50,478 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-19 08:05:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 27 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:05:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-19 08:05:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:05:50,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:50,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:50,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:50,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:50,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:05:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -411694040, now seen corresponding path program 1 times [2022-11-19 08:05:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:50,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262893313] [2022-11-19 08:05:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:05:53,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:53,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262893313] [2022-11-19 08:05:53,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262893313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:53,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5473545] [2022-11-19 08:05:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:53,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:53,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:53,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:05:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:53,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-19 08:05:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:53,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 08:05:53,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 08:05:53,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:53,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 32 [2022-11-19 08:05:53,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:53,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-11-19 08:05:54,002 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2187 (Array Int Int)) (v_ArrVal_2186 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2186) |c_#memory_$Pointer$.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2187) |c_#memory_$Pointer$.base|))) is different from true [2022-11-19 08:05:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,043 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 08:05:54,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 59 [2022-11-19 08:05:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,058 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:05:54,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2022-11-19 08:05:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-19 08:05:54,082 INFO L321 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2022-11-19 08:05:54,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:05:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:54,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:54,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 41 [2022-11-19 08:05:54,249 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-19 08:05:54,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2022-11-19 08:05:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 08:05:54,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:54,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5473545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:54,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595281327] [2022-11-19 08:05:54,684 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:05:54,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:54,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:54,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:54,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:05:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:54,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:54,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:54,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:54,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:54,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:54,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:54,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:54,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:54,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:05:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:54,942 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:54,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:54,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:54,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:55,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:55,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,037 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:55,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:55,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:55,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:55,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:55,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:55,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-19 08:05:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-19 08:05:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-19 08:05:55,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:05:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,377 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:05:55,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:05:55,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,405 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:05:55,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-19 08:05:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:05:55,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,551 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:05:55,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:05:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,579 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:05:55,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-19 08:05:55,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:55,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:55,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:55,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,887 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:55,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:55,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:55,908 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:55,928 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:55,928 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:55,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:55,948 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:55,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:56,034 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:56,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:56,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:56,055 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:05:56,074 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:56,074 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:05:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:56,101 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:05:56,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:05:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,321 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:56,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:56,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:56,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:56,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:56,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,415 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:56,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:56,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:56,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:05:56,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:56,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:05:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:05:56,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:56,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:56,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,580 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:05:56,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:05:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:05:56,615 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-19 08:05:56,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:05:56,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:05:56,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:56,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:05:56,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:05:56,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:05:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:05:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:56,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:05:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:56,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:05:56,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:04,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6385#(and (= |ULTIMATE.start_dll_circular_append_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) 1) (= |ULTIMATE.start_dll_circular_append_~last~1#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)))) (= (select |#length| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 12) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 1) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) |ULTIMATE.start_dll_circular_append_~last~1#1.offset|) (<= (+ 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 4) 0) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= (select |#valid| |ULTIMATE.start_dll_circular_append_~head#1.base|) 1) (or (not (<= (+ |ULTIMATE.start_dll_circular_append_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~last~1#1.base|))) (not (<= 0 |ULTIMATE.start_dll_circular_append_~last~1#1.offset|))) (= |ULTIMATE.start_dll_circular_append_~head#1.base| |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0)) (<= 0 (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_dll_circular_append_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 8)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~head#1.base|) |ULTIMATE.start_dll_circular_append_~head#1.offset|) 0))) (not (= |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| 0)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= (+ |ULTIMATE.start_dll_circular_append_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_append_~head#1.base|)) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_append_~new_last~0#1.base|) 0) 0) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_append_#in~data#1| |ULTIMATE.start_dll_circular_append_~data#1|) (< |ULTIMATE.start_dll_circular_append_~new_last~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_append_#in~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_append_~head#1.offset| |ULTIMATE.start_dll_circular_append_#in~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:06:04,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:06:04,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:06:04,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 34 [2022-11-19 08:06:04,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411212109] [2022-11-19 08:06:04,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:04,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 08:06:04,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 08:06:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3513, Unknown=1, NotChecked=120, Total=3906 [2022-11-19 08:06:04,827 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 35 states, 27 states have (on average 1.962962962962963) internal successors, (53), 31 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:06:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:06,911 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-11-19 08:06:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:06:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 27 states have (on average 1.962962962962963) internal successors, (53), 31 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2022-11-19 08:06:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:06,913 INFO L225 Difference]: With dead ends: 120 [2022-11-19 08:06:06,913 INFO L226 Difference]: Without dead ends: 120 [2022-11-19 08:06:06,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=412, Invalid=5141, Unknown=1, NotChecked=146, Total=5700 [2022-11-19 08:06:06,914 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 240 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:06,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1051 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1217 Invalid, 0 Unknown, 182 Unchecked, 1.2s Time] [2022-11-19 08:06:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-19 08:06:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2022-11-19 08:06:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-11-19 08:06:06,918 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 38 [2022-11-19 08:06:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:06,919 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-11-19 08:06:06,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 27 states have (on average 1.962962962962963) internal successors, (53), 31 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:06:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-11-19 08:06:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:06:06,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:06,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:06,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:07,126 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash -830718632, now seen corresponding path program 1 times [2022-11-19 08:06:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:07,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203220917] [2022-11-19 08:06:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:06:07,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203220917] [2022-11-19 08:06:07,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203220917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:07,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:07,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:06:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016028871] [2022-11-19 08:06:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:06:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:06:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:06:07,252 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:07,332 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-11-19 08:06:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:06:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-11-19 08:06:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:07,333 INFO L225 Difference]: With dead ends: 97 [2022-11-19 08:06:07,333 INFO L226 Difference]: Without dead ends: 97 [2022-11-19 08:06:07,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:06:07,334 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 122 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:07,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 83 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-19 08:06:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2022-11-19 08:06:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-11-19 08:06:07,337 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 40 [2022-11-19 08:06:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:07,337 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-11-19 08:06:07,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-11-19 08:06:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:06:07,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:07,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:07,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 08:06:07,338 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash 17529970, now seen corresponding path program 1 times [2022-11-19 08:06:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:07,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435739067] [2022-11-19 08:06:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:06:07,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:07,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435739067] [2022-11-19 08:06:07,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435739067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:07,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:07,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:06:07,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778097912] [2022-11-19 08:06:07,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:06:07,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:06:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:06:07,625 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:07,930 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2022-11-19 08:06:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:06:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-19 08:06:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:07,931 INFO L225 Difference]: With dead ends: 137 [2022-11-19 08:06:07,931 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 08:06:07,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:06:07,932 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 162 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 234 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:06:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 08:06:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 82. [2022-11-19 08:06:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 76 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-19 08:06:07,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 41 [2022-11-19 08:06:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:07,936 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-19 08:06:07,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 4.666666666666667) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-19 08:06:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:06:07,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:07,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:06:07,937 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash 17529971, now seen corresponding path program 1 times [2022-11-19 08:06:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:07,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706321886] [2022-11-19 08:06:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:06:08,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:08,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706321886] [2022-11-19 08:06:08,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706321886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:08,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:08,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:06:08,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856017282] [2022-11-19 08:06:08,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:06:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:06:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:06:08,399 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 9 states, 6 states have (on average 5.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:08,643 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-11-19 08:06:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:06:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 5.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-19 08:06:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:08,645 INFO L225 Difference]: With dead ends: 119 [2022-11-19 08:06:08,645 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 08:06:08,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:06:08,645 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 238 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:08,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 238 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:06:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 08:06:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-11-19 08:06:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 78 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-11-19 08:06:08,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 41 [2022-11-19 08:06:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:08,649 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-11-19 08:06:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 5.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-11-19 08:06:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:06:08,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:08,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:08,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-19 08:06:08,650 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -333565675, now seen corresponding path program 1 times [2022-11-19 08:06:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:08,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421987926] [2022-11-19 08:06:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:06:09,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:09,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421987926] [2022-11-19 08:06:09,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421987926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:09,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736249897] [2022-11-19 08:06:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:09,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:09,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:09,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:09,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:06:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:06:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:09,654 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-11-19 08:06:09,712 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2723 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2723)))) is different from true [2022-11-19 08:06:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-19 08:06:09,748 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2022-11-19 08:06:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 08:06:09,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:09,826 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_69| Int) (v_ArrVal_2728 (Array Int Int))) (or (not (< |v_node_create_~temp~0#1.base_69| |c_#StackHeapBarrier|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_69| v_ArrVal_2728) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|) 0)))) is different from false [2022-11-19 08:06:09,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736249897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:09,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786782969] [2022-11-19 08:06:09,830 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-19 08:06:09,830 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:09,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:09,831 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:09,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:09,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:06:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:06:09,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:06:09,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:06:09,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:09,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:06:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:09,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:06:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:09,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:06:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:06:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:09,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:06:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:06:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,093 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:06:10,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:06:10,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:10,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:06:10,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:10,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:10,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,188 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:06:10,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:06:10,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:10,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:06:10,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:10,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:10,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:10,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:06:10,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:06:10,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:06:10,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,361 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:06:10,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:06:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:06:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,410 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:06:10,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:06:10,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,464 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:06:10,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:06:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 08:06:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,508 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:06:10,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 08:06:10,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:10,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:10,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:06:10,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:06:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:10,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,770 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:10,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:10,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:06:10,789 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:06:10,810 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:10,811 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:06:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,837 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:10,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,948 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:10,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:10,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:10,968 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:10,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:10,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:06:10,989 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:06:11,014 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:11,015 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:06:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 187 [2022-11-19 08:06:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,169 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:11,169 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 208 treesize of output 198 [2022-11-19 08:06:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,195 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:11,195 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 200 treesize of output 190 [2022-11-19 08:06:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 159 [2022-11-19 08:06:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,321 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 08:06:11,322 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 187 treesize of output 185 [2022-11-19 08:06:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,353 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 08:06:11,354 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 179 treesize of output 173 [2022-11-19 08:06:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 131 [2022-11-19 08:06:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,465 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-19 08:06:11,466 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-19 08:06:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:11,506 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 08:06:11,506 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 35 treesize of output 33 [2022-11-19 08:06:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,677 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:06:11,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:06:11,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:11,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:11,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:11,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:11,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:06:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,774 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:06:11,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:06:11,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:11,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:11,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:11,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:06:11,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:11,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:06:11,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 08:06:11,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:06:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,974 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:06:11,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:06:11,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:06:12,010 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 18 for LOIs [2022-11-19 08:06:12,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:06:12,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:06:12,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:12,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:06:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:12,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:06:12,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:12,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:12,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:06:12,109 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:19,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1786782969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:19,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:06:19,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [15, 15] total 48 [2022-11-19 08:06:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20464861] [2022-11-19 08:06:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:19,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:06:19,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:06:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2029, Unknown=2, NotChecked=186, Total=2450 [2022-11-19 08:06:19,848 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:21,856 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-11-19 08:06:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 08:06:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-19 08:06:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:21,858 INFO L225 Difference]: With dead ends: 117 [2022-11-19 08:06:21,858 INFO L226 Difference]: Without dead ends: 117 [2022-11-19 08:06:21,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=233, Invalid=2029, Unknown=2, NotChecked=186, Total=2450 [2022-11-19 08:06:21,859 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 120 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:21,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 216 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 08:06:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-19 08:06:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2022-11-19 08:06:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-11-19 08:06:21,863 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 43 [2022-11-19 08:06:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:21,863 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-11-19 08:06:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-11-19 08:06:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:06:21,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:21,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:21,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:22,071 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 289945669, now seen corresponding path program 1 times [2022-11-19 08:06:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737109487] [2022-11-19 08:06:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:06:22,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737109487] [2022-11-19 08:06:22,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737109487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:22,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:22,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-19 08:06:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835396824] [2022-11-19 08:06:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:06:22,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:06:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:06:22,934 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:23,625 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-11-19 08:06:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:06:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-19 08:06:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:23,626 INFO L225 Difference]: With dead ends: 100 [2022-11-19 08:06:23,626 INFO L226 Difference]: Without dead ends: 100 [2022-11-19 08:06:23,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:06:23,627 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 277 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:23,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 264 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-19 08:06:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2022-11-19 08:06:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:06:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-11-19 08:06:23,630 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2022-11-19 08:06:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:23,630 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-11-19 08:06:23,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:06:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-11-19 08:06:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:06:23,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:23,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 08:06:23,631 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-19 08:06:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 289945670, now seen corresponding path program 1 times [2022-11-19 08:06:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:23,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914949267] [2022-11-19 08:06:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:06:26,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914949267] [2022-11-19 08:06:26,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914949267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536624652] [2022-11-19 08:06:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:26,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:26,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78968adc-bd4a-47c1-a048-2ddb51a36b8b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:06:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-19 08:06:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:26,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:06:26,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3042 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_3042))) is different from true [2022-11-19 08:06:26,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3042 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_3042))) is different from true [2022-11-19 08:06:26,591 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:06:26,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:06:26,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:06:26,827 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:06:26,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-19 08:06:27,629 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:06:27,629 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 25 [2022-11-19 08:06:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:27,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:27,658 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 08:06:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-19 08:06:27,688 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-19 08:06:27,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:06:28,048 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 08:06:28,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-11-19 08:06:28,065 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 08:06:28,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:06:28,324 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:06:28,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 62 [2022-11-19 08:06:28,350 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:06:28,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 76 [2022-11-19 08:06:28,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:06:28,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:06:28,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-19 08:06:28,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 08:06:28,827 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 13 [2022-11-19 08:06:28,830 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 10 [2022-11-19 08:06:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2022-11-19 08:06:28,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:35,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536624652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:35,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175044698] [2022-11-19 08:06:35,282 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-19 08:06:35,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:35,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:35,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:35,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:35,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:06:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:06:35,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:06:35,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:06:35,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:35,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:35,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:06:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:35,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:06:35,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:06:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:06:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:06:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 08:06:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-19 08:06:35,590 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:06:35,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:06:35,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:06:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 08:06:35,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-19 08:06:35,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-19 08:06:35,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:35,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:35,885 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:35,887 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:35,959 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 08:06:35,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-19 08:06:36,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:36,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 08:06:36,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-19 08:06:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:36,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:06:36,225 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:36,228 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:36,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2022-11-19 08:06:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-19 08:06:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-19 08:06:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:06:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,502 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:06:36,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-19 08:06:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,539 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:06:36,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:06:36,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:36,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2022-11-19 08:06:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,737 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 08:06:36,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-19 08:06:36,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:36,766 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:06:36,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-19 08:06:36,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:06:36,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:36,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:06:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 08:06:37,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 08:06:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:37,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:37,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:06:37,148 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:06:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:37,176 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:37,194 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,194 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:06:37,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:06:37,272 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 19 [2022-11-19 08:06:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:37,304 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:37,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:37,330 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-19 08:06:37,347 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 08:06:37,348 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-19 08:06:37,571 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-19 08:06:37,572 INFO L350 Elim1Store]: Elim1 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 210 treesize of output 202 [2022-11-19 08:06:37,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:37,754 INFO L321 Elim1Store]: treesize reduction 114, result has 45.5 percent of original size [2022-11-19 08:06:37,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 273 treesize of output 320 [2022-11-19 08:06:37,911 INFO L321 Elim1Store]: treesize reduction 95, result has 41.0 percent of original size [2022-11-19 08:06:37,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 289 [2022-11-19 08:06:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:49,581 INFO L173 IndexEqualityManager]: detected equality via solver