./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:53:54,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:53:54,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:53:54,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:53:54,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:53:54,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:53:54,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:53:54,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:53:54,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:53:54,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:53:54,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:53:54,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:53:54,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:53:54,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:53:54,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:53:54,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:53:54,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:53:54,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:53:54,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:53:54,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:53:54,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:53:54,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:53:54,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:53:54,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:53:54,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:53:54,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:53:54,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:53:54,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:53:54,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:53:54,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:53:54,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:53:54,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:53:54,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:53:54,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:53:54,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:53:54,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:53:54,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:53:54,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:53:54,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:53:54,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:53:54,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:53:54,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:53:54,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:53:54,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:53:54,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:53:54,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:53:54,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:53:54,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:53:54,675 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:53:54,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:53:54,676 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:53:54,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:53:54,677 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:53:54,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:53:54,678 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:53:54,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:53:54,679 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:53:54,679 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:53:54,679 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:53:54,680 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:53:54,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:53:54,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:53:54,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:53:54,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:53:54,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:53:54,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:53:54,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:53:54,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:53:54,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:53:54,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:53:54,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:53:54,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:53:54,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:53:54,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:53:54,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:54,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:53:54,686 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:53:54,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:53:54,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:53:54,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:53:54,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:53:54,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:53:54,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:53:54,690 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_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 [2022-11-03 01:53:55,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:53:55,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:53:55,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:53:55,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:53:55,133 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:53:55,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/sina5.c [2022-11-03 01:53:55,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/data/42ebd25b1/e3b7bf377b4a4ee28766883ba0db2f69/FLAG7c9e198e2 [2022-11-03 01:53:55,757 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:53:55,758 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/sv-benchmarks/c/array-fpi/sina5.c [2022-11-03 01:53:55,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/data/42ebd25b1/e3b7bf377b4a4ee28766883ba0db2f69/FLAG7c9e198e2 [2022-11-03 01:53:56,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/data/42ebd25b1/e3b7bf377b4a4ee28766883ba0db2f69 [2022-11-03 01:53:56,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:53:56,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:53:56,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:56,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:53:56,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:53:56,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b775670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56, skipping insertion in model container [2022-11-03 01:53:56,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:53:56,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:53:56,340 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2022-11-03 01:53:56,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:56,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:53:56,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2022-11-03 01:53:56,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:56,411 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:53:56,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56 WrapperNode [2022-11-03 01:53:56,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:56,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:56,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:53:56,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:53:56,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,458 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 109 [2022-11-03 01:53:56,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:56,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:53:56,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:53:56,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:53:56,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:53:56,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:53:56,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:53:56,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:53:56,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (1/1) ... [2022-11-03 01:53:56,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:56,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:53:56,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:53:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:53:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:53:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:53:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:53:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:53:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:53:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:53:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:53:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:53:56,691 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:53:56,694 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:53:57,020 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:53:57,095 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:53:57,096 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 01:53:57,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:57 BoogieIcfgContainer [2022-11-03 01:53:57,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:53:57,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:53:57,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:53:57,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:53:57,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:53:56" (1/3) ... [2022-11-03 01:53:57,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47722855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:57, skipping insertion in model container [2022-11-03 01:53:57,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:56" (2/3) ... [2022-11-03 01:53:57,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47722855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:57, skipping insertion in model container [2022-11-03 01:53:57,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:57" (3/3) ... [2022-11-03 01:53:57,109 INFO L112 eAbstractionObserver]: Analyzing ICFG sina5.c [2022-11-03 01:53:57,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:53:57,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:53:57,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:53:57,195 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c5ed7d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:53:57,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:53:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:53:57,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:57,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:57,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1752185494, now seen corresponding path program 1 times [2022-11-03 01:53:57,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468766613] [2022-11-03 01:53:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:57,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:57,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:57,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468766613] [2022-11-03 01:53:57,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468766613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:57,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:53:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833073276] [2022-11-03 01:53:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:53:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:53:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:53:57,655 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:57,759 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-11-03 01:53:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:53:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:53:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:57,771 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:53:57,771 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 01:53:57,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:53:57,780 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:57,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 01:53:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 01:53:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-11-03 01:53:57,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2022-11-03 01:53:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:57,823 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-11-03 01:53:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-11-03 01:53:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:53:57,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:57,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:57,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:53:57,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash 865565438, now seen corresponding path program 1 times [2022-11-03 01:53:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:57,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251351926] [2022-11-03 01:53:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:53:58,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:58,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251351926] [2022-11-03 01:53:58,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251351926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:58,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:58,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:53:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763201933] [2022-11-03 01:53:58,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:58,026 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:58,078 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2022-11-03 01:53:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:53:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:53:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:58,080 INFO L225 Difference]: With dead ends: 30 [2022-11-03 01:53:58,080 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:53:58,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:58,082 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:58,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:53:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2022-11-03 01:53:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-03 01:53:58,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-11-03 01:53:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:58,089 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-03 01:53:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-03 01:53:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:53:58,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:58,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:53:58,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -351940213, now seen corresponding path program 1 times [2022-11-03 01:53:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653229613] [2022-11-03 01:53:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:00,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:00,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653229613] [2022-11-03 01:54:00,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653229613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033470300] [2022-11-03 01:54:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:00,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:00,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:00,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:00,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:54:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 01:54:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:00,340 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:54:00,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:54:00,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-03 01:54:00,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-03 01:54:00,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:54:00,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-11-03 01:54:00,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-03 01:54:01,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-03 01:54:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:01,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033470300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029292529] [2022-11-03 01:54:02,113 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:02,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:02,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:02,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:02,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,357 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:02,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:54:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:54:02,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:54:02,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:02,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:02,724 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:54:02,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:54:02,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:03,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:03,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:03,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:03,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:03,174 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:03,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:03,256 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:03,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:03,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:03,341 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:03,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:03,415 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:03,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:03,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:03,464 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:03,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:54:03,557 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:03,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:03,616 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:04,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '277#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:04,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:04,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:04,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-11-03 01:54:04,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230998863] [2022-11-03 01:54:04,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 01:54:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 01:54:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:54:04,895 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:05,382 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-03 01:54:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:54:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:54:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:05,387 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:54:05,387 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:54:05,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:54:05,389 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:05,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 38 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 277 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-03 01:54:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:54:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-11-03 01:54:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-03 01:54:05,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2022-11-03 01:54:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:05,398 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-03 01:54:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-03 01:54:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:54:05,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:05,399 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:05,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:05,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -404843997, now seen corresponding path program 2 times [2022-11-03 01:54:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:05,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075380446] [2022-11-03 01:54:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:05,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:05,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075380446] [2022-11-03 01:54:05,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075380446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:05,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080555300] [2022-11-03 01:54:05,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:05,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:05,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:54:05,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:54:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:54:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:05,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:05,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080555300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351245458] [2022-11-03 01:54:05,947 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:05,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:05,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:05,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:05,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,146 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:06,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:54:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:54:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:54:06,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:06,460 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:54:06,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:54:06,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:06,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:06,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:06,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:06,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:06,843 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:06,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:06,909 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:06,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:06,948 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:06,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:07,015 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:07,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:07,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:07,081 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:07,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:07,164 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:07,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:07,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:07,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:07,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:07,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:07,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:54:07,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10000450] [2022-11-03 01:54:07,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:07,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:54:07,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:54:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:54:07,572 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:07,765 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-11-03 01:54:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:54:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 01:54:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:07,768 INFO L225 Difference]: With dead ends: 64 [2022-11-03 01:54:07,768 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 01:54:07,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:54:07,770 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:07,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 01:54:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2022-11-03 01:54:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-03 01:54:07,782 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 16 [2022-11-03 01:54:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:07,782 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-03 01:54:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-03 01:54:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:54:07,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:07,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:07,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1960184638, now seen corresponding path program 3 times [2022-11-03 01:54:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549495476] [2022-11-03 01:54:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:08,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:08,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549495476] [2022-11-03 01:54:08,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549495476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571317060] [2022-11-03 01:54:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:54:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:08,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:54:08,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:54:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:54:08,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:08,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:08,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571317060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805416343] [2022-11-03 01:54:08,262 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:08,262 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:08,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:08,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:08,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,419 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:08,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:54:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:54:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:54:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:08,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:08,743 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:54:08,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:54:08,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:08,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:08,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:08,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:08,995 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:08,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:09,060 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:09,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:09,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:09,131 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:09,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:09,204 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:09,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:09,273 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:09,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:09,339 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:09,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:09,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:09,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '768#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:09,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:09,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:09,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:54:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778819519] [2022-11-03 01:54:09,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:54:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:54:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:54:09,762 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:09,892 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-11-03 01:54:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:54:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 01:54:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:09,894 INFO L225 Difference]: With dead ends: 59 [2022-11-03 01:54:09,894 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 01:54:09,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:09,895 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:09,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 01:54:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-11-03 01:54:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-03 01:54:09,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-03 01:54:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:09,902 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-03 01:54:09,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-03 01:54:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:54:09,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:09,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:09,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:10,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:10,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash -349840970, now seen corresponding path program 4 times [2022-11-03 01:54:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:10,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907985292] [2022-11-03 01:54:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:12,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907985292] [2022-11-03 01:54:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907985292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427147301] [2022-11-03 01:54:12,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:54:12,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:12,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:12,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:54:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 01:54:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:12,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:54:12,872 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:54:12,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:54:12,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-03 01:54:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:12,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2022-11-03 01:54:13,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 38 treesize of output 43 [2022-11-03 01:54:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2022-11-03 01:54:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-11-03 01:54:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:13,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-11-03 01:54:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:13,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2022-11-03 01:54:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:13,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2022-11-03 01:54:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:14,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-11-03 01:54:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:14,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:14,185 INFO L356 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-03 01:54:14,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:54:14,397 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:54:14,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 61 treesize of output 41 [2022-11-03 01:54:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:14,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:29,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427147301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:29,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1971222425] [2022-11-03 01:54:29,957 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:29,958 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:29,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:29,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:29,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:29,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:29,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:54:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,149 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:30,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:30,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:54:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:54:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:30,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:30,377 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:54:30,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:54:30,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:30,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:30,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:30,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:30,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:30,632 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:30,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:30,692 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:30,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:30,735 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:30,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:30,804 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:30,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:30,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:30,886 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:30,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:54:30,946 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:30,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:30,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:32,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:32,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:32,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:32,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2022-11-03 01:54:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142828326] [2022-11-03 01:54:32,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 01:54:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 01:54:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2429, Unknown=13, NotChecked=0, Total=2652 [2022-11-03 01:54:32,512 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:35,103 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-03 01:54:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:54:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:54:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:35,105 INFO L225 Difference]: With dead ends: 45 [2022-11-03 01:54:35,105 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 01:54:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=238, Invalid=2719, Unknown=13, NotChecked=0, Total=2970 [2022-11-03 01:54:35,107 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:35,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 49 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 176 Invalid, 0 Unknown, 334 Unchecked, 0.2s Time] [2022-11-03 01:54:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 01:54:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-11-03 01:54:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-11-03 01:54:35,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 20 [2022-11-03 01:54:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-11-03 01:54:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-11-03 01:54:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:54:35,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:35,120 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:35,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:35,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:35,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -618285026, now seen corresponding path program 5 times [2022-11-03 01:54:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736946600] [2022-11-03 01:54:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:54:35,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:35,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736946600] [2022-11-03 01:54:35,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736946600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877127764] [2022-11-03 01:54:35,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:35,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:35,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:35,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:35,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:54:35,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:54:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:54:35,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:54:35,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877127764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94370188] [2022-11-03 01:54:35,801 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:35,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:35,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:35,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:35,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:35,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,957 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:54:35,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:54:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:36,121 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:36,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:36,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:54:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:36,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:54:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:36,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:36,376 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:54:36,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:54:36,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:36,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:54:36,535 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:54:36,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-03 01:54:36,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:36,613 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:36,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:36,686 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:36,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:36,764 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:36,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:36,831 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:36,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:36,870 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:36,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:36,938 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:36,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:36,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:37,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:37,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:37,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:37,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:54:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955492461] [2022-11-03 01:54:37,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:54:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:54:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:54:37,563 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:37,896 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2022-11-03 01:54:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:54:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 01:54:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:37,899 INFO L225 Difference]: With dead ends: 93 [2022-11-03 01:54:37,901 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 01:54:37,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:54:37,902 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:37,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 75 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 01:54:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-11-03 01:54:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-11-03 01:54:37,931 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 21 [2022-11-03 01:54:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:37,931 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-11-03 01:54:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-11-03 01:54:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:54:37,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:37,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:37,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:38,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:38,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1865835095, now seen corresponding path program 6 times [2022-11-03 01:54:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435264265] [2022-11-03 01:54:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:54:38,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:38,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435264265] [2022-11-03 01:54:38,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435264265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:38,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915014817] [2022-11-03 01:54:38,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:54:38,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:38,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:38,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:54:38,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:54:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:54:38,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:54:38,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915014817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252953823] [2022-11-03 01:54:38,458 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:54:38,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:38,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:38,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:38,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:54:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,634 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:38,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:54:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:54:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:38,853 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:54:38,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:54:38,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:38,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:38,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:39,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:39,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:39,086 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:39,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:39,142 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:39,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:39,197 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:39,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:39,264 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:39,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:39,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:39,320 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:39,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:39,384 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:39,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:39,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:39,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1756#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:39,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:39,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:39,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:54:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584965707] [2022-11-03 01:54:39,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:54:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:54:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:54:39,851 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:40,018 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-11-03 01:54:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:54:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 01:54:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:40,021 INFO L225 Difference]: With dead ends: 84 [2022-11-03 01:54:40,021 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 01:54:40,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:54:40,022 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:40,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 01:54:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-11-03 01:54:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-03 01:54:40,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2022-11-03 01:54:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:40,033 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-03 01:54:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-03 01:54:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:54:40,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:40,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:40,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:40,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1778535419, now seen corresponding path program 1 times [2022-11-03 01:54:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:40,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756704318] [2022-11-03 01:54:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:42,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756704318] [2022-11-03 01:54:42,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756704318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:42,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52684629] [2022-11-03 01:54:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:42,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:42,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:42,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:54:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:54:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:42,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:54:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:42,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2022-11-03 01:54:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2022-11-03 01:54:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 30 [2022-11-03 01:54:43,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 45 [2022-11-03 01:54:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 01:54:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-03 01:54:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 57 [2022-11-03 01:54:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:43,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:43,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2022-11-03 01:54:44,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 60 [2022-11-03 01:54:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2022-11-03 01:54:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-03 01:54:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:44,801 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 01:54:44,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 44 [2022-11-03 01:54:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:44,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:50,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52684629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863711337] [2022-11-03 01:54:50,940 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:54:50,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:50,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:50,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:50,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:50,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:54:50,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,155 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:54:51,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:54:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,356 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:54:51,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:54:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:54:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:51,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:51,568 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:54:51,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:54:51,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:51,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:51,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:54:51,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:54:51,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:51,859 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:51,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:54:51,943 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:51,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:51,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:52,007 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:54:52,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:54:52,078 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:54:52,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:52,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:52,121 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:54:52,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:54:52,188 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:54:52,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:54:52,289 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:54,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2170#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:54,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:54,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:54,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-11-03 01:54:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184938548] [2022-11-03 01:54:54,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 01:54:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 01:54:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3283, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 01:54:54,587 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 55 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:59,998 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-03 01:54:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:54:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 01:54:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:59,999 INFO L225 Difference]: With dead ends: 46 [2022-11-03 01:54:59,999 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:55:00,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 01:55:00,002 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:00,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 419 Invalid, 0 Unknown, 22 Unchecked, 1.6s Time] [2022-11-03 01:55:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:55:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 01:55:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-03 01:55:00,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2022-11-03 01:55:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:00,010 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-03 01:55:00,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-03 01:55:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:55:00,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:00,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:00,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:00,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:00,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1580525205, now seen corresponding path program 7 times [2022-11-03 01:55:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971811295] [2022-11-03 01:55:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:00,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:04,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971811295] [2022-11-03 01:55:04,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971811295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241332965] [2022-11-03 01:55:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:55:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:04,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:04,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:55:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:04,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 01:55:04,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:04,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:55:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,332 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:55:04,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 01:55:04,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-03 01:55:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 30 [2022-11-03 01:55:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 01:55:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 57 [2022-11-03 01:55:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:04,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2022-11-03 01:55:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-11-03 01:55:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 81 [2022-11-03 01:55:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:05,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-11-03 01:55:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2022-11-03 01:55:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:05,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 91 [2022-11-03 01:55:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2022-11-03 01:55:06,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 79 [2022-11-03 01:55:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 77 [2022-11-03 01:55:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:06,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:06,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:06,813 INFO L356 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2022-11-03 01:55:06,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 75 treesize of output 100 [2022-11-03 01:55:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:07,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:07,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:07,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:07,074 INFO L356 Elim1Store]: treesize reduction 178, result has 22.9 percent of original size [2022-11-03 01:55:07,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 103 [2022-11-03 01:55:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:07,310 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:55:07,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 44 [2022-11-03 01:55:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:07,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:08,151 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_598 Int) (v_ArrVal_596 Int) (|v_ULTIMATE.start_main_~i~0#1_349| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_596) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_349|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_598) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (* c_~N~0 2) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_349|)))) is different from false [2022-11-03 01:55:10,174 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_598 Int) (v_ArrVal_596 Int) (|v_ULTIMATE.start_main_~i~0#1_350| Int) (|v_ULTIMATE.start_main_~i~0#1_349| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_350| 1) |v_ULTIMATE.start_main_~i~0#1_349|)) (= (select (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse0 .cse1)))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_350|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_596) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_349|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_598) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (* c_~N~0 2) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_350|)))) is different from false [2022-11-03 01:55:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-03 01:55:42,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241332965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:42,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031932032] [2022-11-03 01:55:42,768 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:55:42,768 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:42,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:42,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:42,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,936 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:55:42,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:55:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:55:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:43,107 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:55:43,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:55:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:43,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:55:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:43,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:43,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:43,302 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:55:43,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:55:43,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:43,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:55:43,518 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:55:43,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-03 01:55:43,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:43,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:43,593 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:55:43,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:55:43,673 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:43,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:43,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:43,741 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:55:43,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:55:43,813 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:43,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:43,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:43,853 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:55:43,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:55:43,916 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:55:43,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:55:43,984 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:47,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2527#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:47,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:47,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:47,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2022-11-03 01:55:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387259726] [2022-11-03 01:55:47,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:47,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 01:55:47,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 01:55:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4505, Unknown=3, NotChecked=274, Total=5112 [2022-11-03 01:55:47,536 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:49,166 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-03 01:55:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 01:55:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 01:55:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:49,167 INFO L225 Difference]: With dead ends: 53 [2022-11-03 01:55:49,167 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 01:55:49,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=378, Invalid=5177, Unknown=3, NotChecked=294, Total=5852 [2022-11-03 01:55:49,170 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:49,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 374 Invalid, 0 Unknown, 460 Unchecked, 0.5s Time] [2022-11-03 01:55:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 01:55:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-03 01:55:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-11-03 01:55:49,184 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 25 [2022-11-03 01:55:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:49,184 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-11-03 01:55:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-11-03 01:55:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:55:49,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:49,186 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:49,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:55:49,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1585314819, now seen corresponding path program 8 times [2022-11-03 01:55:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:49,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904645364] [2022-11-03 01:55:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:49,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:55:49,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904645364] [2022-11-03 01:55:49,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904645364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:49,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720149632] [2022-11-03 01:55:49,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:49,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:49,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:49,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:55:49,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:55:49,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:55:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:55:49,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:55:50,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720149632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:50,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373272551] [2022-11-03 01:55:50,010 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:55:50,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:50,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:50,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:50,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,185 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:55:50,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:55:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:55:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:55:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:55:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:50,428 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:55:50,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:55:50,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:50,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:50,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:55:50,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:50,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:50,634 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:55:50,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:55:50,712 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:50,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:50,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:50,805 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:55:50,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:55:50,872 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:50,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:50,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:50,918 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:55:50,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:55:50,989 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:55:50,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:55:51,036 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:51,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2894#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:51,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:51,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:51,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-03 01:55:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925395875] [2022-11-03 01:55:51,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:55:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:55:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:55:51,770 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:52,132 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2022-11-03 01:55:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:55:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 01:55:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:52,134 INFO L225 Difference]: With dead ends: 118 [2022-11-03 01:55:52,134 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 01:55:52,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 20 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:55:52,135 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:52,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:55:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 01:55:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2022-11-03 01:55:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-11-03 01:55:52,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 26 [2022-11-03 01:55:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:52,148 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-11-03 01:55:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-11-03 01:55:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:55:52,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:52,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:52,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:52,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:55:52,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1425324310, now seen corresponding path program 9 times [2022-11-03 01:55:52,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:52,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58876996] [2022-11-03 01:55:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:52,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:55:52,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58876996] [2022-11-03 01:55:52,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58876996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064214574] [2022-11-03 01:55:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:55:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:52,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:52,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:55:52,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:55:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:55:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:55:52,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:55:52,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064214574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:52,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594208958] [2022-11-03 01:55:52,827 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:55:52,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:52,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:52,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:52,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:52,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 01:55:52,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:52,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,018 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:55:53,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:55:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:55:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:55:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:53,199 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:55:53,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:55:53,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:53,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:55:53,337 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:55:53,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-03 01:55:53,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:53,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:53,405 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:55:53,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:55:53,468 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:53,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:53,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:53,533 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:55:53,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:55:53,606 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:55:53,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:53,652 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:55:53,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:55:53,734 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:55:53,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:55:53,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:54,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3381#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:54,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:54,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:54,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-03 01:55:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525590856] [2022-11-03 01:55:54,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:54,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:55:54,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:55:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:55:54,549 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:54,792 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-11-03 01:55:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 01:55:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:54,794 INFO L225 Difference]: With dead ends: 106 [2022-11-03 01:55:54,794 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 01:55:54,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 17 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:55:54,795 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:54,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 49 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:55:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 01:55:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2022-11-03 01:55:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-03 01:55:54,828 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2022-11-03 01:55:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:54,831 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-03 01:55:54,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-03 01:55:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:55:54,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:54,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:54,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:55,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:55,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 305329190, now seen corresponding path program 2 times [2022-11-03 01:55:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121705138] [2022-11-03 01:55:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:55:57,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:57,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121705138] [2022-11-03 01:55:57,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121705138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:57,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712640406] [2022-11-03 01:55:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:57,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:57,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:55:57,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:55:57,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 01:55:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:57,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 42 [2022-11-03 01:55:57,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:55:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:55:58,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 34 [2022-11-03 01:55:58,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:55:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 30 [2022-11-03 01:55:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-11-03 01:55:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-11-03 01:55:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:58,681 INFO L356 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-03 01:55:58,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 55 [2022-11-03 01:55:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:59,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 42 [2022-11-03 01:55:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:55:59,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:59,124 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:59,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 162 [2022-11-03 01:57:59,143 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881)) (.cse1 (+ (* c_~N~0 2) 1))) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) c_~N~0) (= (select .cse0 .cse2) .cse1))))) is different from false [2022-11-03 01:57:59,296 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 Int) (v_ArrVal_868 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_868) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881)) (.cse1 (+ (* c_~N~0 2) 1))) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) c_~N~0) (= (select .cse0 .cse2) .cse1))))) is different from false [2022-11-03 01:57:59,390 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_ArrVal_881 Int) (v_ArrVal_868 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int) (v_ArrVal_865 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (+ (* 2 ~N~0) 1)) (.cse1 (store (let ((.cse5 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_865)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_868) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881))) (or (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) ~N~0) (= .cse0 (select .cse1 .cse2)))))) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-11-03 01:57:59,437 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 Int) (v_ArrVal_868 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_496| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int) (v_ArrVal_865 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_496|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_865)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_868) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse2 (+ (select .cse4 .cse2) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881)) (.cse0 (+ (* 2 ~N~0) 1))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) ~N~0) (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (< |v_ULTIMATE.start_main_~i~0#1_496| ~N~0)) (= (select .cse1 .cse2) .cse0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_496|)))))) is different from false [2022-11-03 01:57:59,500 INFO L356 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-11-03 01:57:59,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 524 treesize of output 237 [2022-11-03 01:57:59,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1797 treesize of output 1729 [2022-11-03 01:57:59,556 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:59,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 1876 treesize of output 1702 [2022-11-03 01:57:59,614 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:59,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 1297 treesize of output 1275 [2022-11-03 01:57:59,716 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:59,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1681 treesize of output 1713 [2022-11-03 01:58:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 10 trivial. 13 not checked. [2022-11-03 01:58:02,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712640406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127639899] [2022-11-03 01:58:02,029 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:58:02,029 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:02,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:02,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:02,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,185 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:58:02,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:58:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:58:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:58:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:58:02,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:02,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:02,388 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:58:02,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 01:58:02,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:58:02,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:58:02,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 01:58:02,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:58:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:02,591 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:58:02,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:58:02,697 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:58:02,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:58:02,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:02,758 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:58:02,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:58:02,826 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:58:02,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:58:02,876 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:58:02,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:58:02,961 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:58:02,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:58:03,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:58:04,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3884#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:58:04,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:58:04,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:04,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 18] total 54 [2022-11-03 01:58:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225290315] [2022-11-03 01:58:04,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 01:58:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 01:58:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2624, Unknown=51, NotChecked=436, Total=3422 [2022-11-03 01:58:04,850 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:04,978 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= (select .cse0 0) 1) (let ((.cse2 (+ (* c_~N~0 2) 1))) (or (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (= (select .cse0 .cse1) .cse2) (not (= .cse2 .cse3)))) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_881 Int) (v_ArrVal_868 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_496| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int) (v_ArrVal_865 Int)) (let ((.cse5 (store (let ((.cse8 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse0 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_496|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_865)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_868) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse7 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse6 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse6 .cse1 (+ (select .cse7 .cse1) (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881)) (.cse4 (+ (* 2 ~N~0) 1))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) ~N~0) (not (= .cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (< |v_ULTIMATE.start_main_~i~0#1_496| ~N~0)) (= (select .cse5 .cse1) .cse4) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_496|))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (= .cse3 1) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (= |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2022-11-03 01:58:07,383 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse0 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (select .cse2 0)) (.cse4 (select .cse2 8)) (.cse9 (<= 3 c_~N~0)) (.cse1 (select .cse2 .cse6))) (and (not (= .cse0 0)) (= .cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (= .cse0 8)) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse3 .cse4) (forall ((v_ArrVal_881 Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int)) (let ((.cse7 (+ (* c_~N~0 2) 1)) (.cse5 (store (store .cse2 .cse0 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse2 .cse0))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_481|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881))) (or (= (select .cse5 .cse6) .cse7) (not (= .cse7 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_481| 1) c_~N~0)))) (or (<= (+ .cse8 1 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (* c_~N~0 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (and (= .cse3 1) (= .cse4 1) .cse9 (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) .cse9 (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse1 (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)))) is different from false [2022-11-03 01:58:09,392 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= (select .cse0 0) (select .cse0 8)) (let ((.cse2 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (select .cse0 .cse5))) (or (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (<= .cse1 |ULTIMATE.start_main_~#sum~0#1.base|) (= (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 1) .cse2))) (<= |c_ULTIMATE.start_main_~i~0#1| 2)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (and (= .cse3 .cse2) (= .cse4 .cse3)))) (<= .cse1 |ULTIMATE.start_main_~#sum~0#1.base|))) (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (<= .cse1 |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse4 (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 3 c_~N~0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_881 Int)) (let ((.cse6 (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_881)) (.cse7 (+ (* c_~N~0 2) 1))) (or (not (= (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7)) (= (select .cse6 .cse5) .cse7)))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-11-03 01:58:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:12,756 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-11-03 01:58:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:58:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 01:58:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:12,757 INFO L225 Difference]: With dead ends: 67 [2022-11-03 01:58:12,757 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 01:58:12,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 130.4s TimeCoverageRelationStatistics Valid=461, Invalid=3411, Unknown=62, NotChecked=896, Total=4830 [2022-11-03 01:58:12,759 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:12,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 334 Invalid, 0 Unknown, 219 Unchecked, 0.4s Time] [2022-11-03 01:58:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 01:58:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-11-03 01:58:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-11-03 01:58:12,778 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 28 [2022-11-03 01:58:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-11-03 01:58:12,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-11-03 01:58:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:58:12,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:12,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:12,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:12,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash -669577002, now seen corresponding path program 10 times [2022-11-03 01:58:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017527921] [2022-11-03 01:58:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:18,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017527921] [2022-11-03 01:58:18,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017527921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688382679] [2022-11-03 01:58:18,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:58:18,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:18,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:18,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:58:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:18,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-03 01:58:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:18,195 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:58:18,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 01:58:18,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-03 01:58:18,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-03 01:58:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 33 [2022-11-03 01:58:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:58:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2022-11-03 01:58:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 68 [2022-11-03 01:58:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2022-11-03 01:58:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 92 [2022-11-03 01:58:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 104 [2022-11-03 01:58:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 109 [2022-11-03 01:58:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 111 [2022-11-03 01:58:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 115 [2022-11-03 01:58:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:19,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:19,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 113 [2022-11-03 01:58:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:20,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 121 [2022-11-03 01:58:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 123 [2022-11-03 01:58:20,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2022-11-03 01:58:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:20,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 107 [2022-11-03 01:58:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 107 [2022-11-03 01:58:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:21,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:21,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:21,589 INFO L356 Elim1Store]: treesize reduction 190, result has 29.9 percent of original size [2022-11-03 01:58:21,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 103 treesize of output 144 [2022-11-03 01:58:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:21,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:21,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:22,028 INFO L356 Elim1Store]: treesize reduction 248, result has 26.4 percent of original size [2022-11-03 01:58:22,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 141 treesize of output 161 [2022-11-03 01:58:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:22,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:22,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:22,435 INFO L356 Elim1Store]: treesize reduction 258, result has 23.4 percent of original size [2022-11-03 01:58:22,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 103 treesize of output 136 [2022-11-03 01:58:22,729 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:58:22,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 47 [2022-11-03 01:58:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:06,661 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_542| Int) (v_ArrVal_1024 Int) (|v_ULTIMATE.start_main_~i~0#1_541| Int) (v_ArrVal_1025 Int) (v_ArrVal_1027 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1024) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_542|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1025) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_541|)) v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (* c_~N~0 2) 1)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_542| 1) |v_ULTIMATE.start_main_~i~0#1_541|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_542|)))) is different from false [2022-11-03 01:59:08,688 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_543| Int) (|v_ULTIMATE.start_main_~i~0#1_542| Int) (v_ArrVal_1024 Int) (|v_ULTIMATE.start_main_~i~0#1_541| Int) (v_ArrVal_1025 Int) (v_ArrVal_1027 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_543| 1) |v_ULTIMATE.start_main_~i~0#1_542|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_542| 1) |v_ULTIMATE.start_main_~i~0#1_541|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_543|)) (= (+ (* c_~N~0 2) 1) (select (store (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse1 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse0 .cse1)))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_543|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1024) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_542|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1025) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_541|)) v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-11-03 02:02:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 42 refuted. 1 times theorem prover too weak. 0 trivial. 7 not checked. [2022-11-03 02:02:46,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688382679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:46,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588213866] [2022-11-03 02:02:46,892 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:02:46,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:46,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:46,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:46,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:46,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:46,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 02:02:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:46,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:46,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,074 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 02:02:47,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 02:02:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,242 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:02:47,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:02:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:02:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,410 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:02:47,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 02:02:47,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:47,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:47,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-11-03 02:02:47,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,624 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:02:47,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:02:47,700 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:02:47,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:02:47,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,766 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:02:47,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:02:47,835 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:02:47,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:02:47,874 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:02:47,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:02:47,936 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 02:02:47,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 02:02:47,983 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:58,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4396#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:58,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:58,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:58,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 77 [2022-11-03 02:02:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867077455] [2022-11-03 02:02:58,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-03 02:02:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-03 02:02:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=5856, Unknown=86, NotChecked=314, Total=6642 [2022-11-03 02:02:58,586 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:03,803 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-11-03 02:03:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:03:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 02:03:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:03,804 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:03:03,805 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:03:03,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 18 SyntacticMatches, 21 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 279.4s TimeCoverageRelationStatistics Valid=454, Invalid=6777, Unknown=87, NotChecked=338, Total=7656 [2022-11-03 02:03:03,808 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1221 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:03,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 136 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 752 Invalid, 0 Unknown, 1221 Unchecked, 1.0s Time] [2022-11-03 02:03:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:03:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-11-03 02:03:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2022-11-03 02:03:03,843 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 30 [2022-11-03 02:03:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:03,843 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2022-11-03 02:03:03,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2022-11-03 02:03:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:03:03,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:03,844 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:03,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:03:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:03:04,050 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -448656066, now seen corresponding path program 11 times [2022-11-03 02:03:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:04,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439957734] [2022-11-03 02:03:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:03:04,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:04,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439957734] [2022-11-03 02:03:04,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439957734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:04,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998881941] [2022-11-03 02:03:04,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:03:04,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:04,280 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:04,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:03:04,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:03:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:03:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:03:04,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:03:04,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998881941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467617570] [2022-11-03 02:03:04,995 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:03:04,995 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:04,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:04,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:04,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,161 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 02:03:05,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 02:03:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-11-03 02:03:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,335 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:03:05,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:03:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:03:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:05,489 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:03:05,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 416 treesize of output 412 [2022-11-03 02:03:05,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:03:05,623 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:03:05,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 71 [2022-11-03 02:03:05,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,691 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:03:05,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:03:05,764 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:03:05,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:03:05,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:05,825 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:03:05,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:03:05,886 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:03:05,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:03:05,925 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:03:05,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:03:05,987 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 02:03:05,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 02:03:06,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:06,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4937#(and (= (ite (= (+ (* 2 ~N~0) 1) |ULTIMATE.start_main_#t~mem19#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem19#1|) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:06,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:06,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-03 02:03:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14127290] [2022-11-03 02:03:06,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:03:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:03:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:03:06,806 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:07,383 INFO L93 Difference]: Finished difference Result 171 states and 197 transitions. [2022-11-03 02:03:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:03:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-03 02:03:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:07,384 INFO L225 Difference]: With dead ends: 171 [2022-11-03 02:03:07,384 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 02:03:07,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:03:07,386 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 99 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:07,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 148 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:03:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 02:03:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2022-11-03 02:03:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-11-03 02:03:07,434 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 31 [2022-11-03 02:03:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:07,434 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-11-03 02:03:07,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-11-03 02:03:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:03:07,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:07,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:07,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 02:03:07,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:03:07,641 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash -673588341, now seen corresponding path program 3 times [2022-11-03 02:03:07,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:07,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586322609] [2022-11-03 02:03:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:12,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586322609] [2022-11-03 02:03:12,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586322609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765808899] [2022-11-03 02:03:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:03:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:12,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:12,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c22baf8-9ecf-4a84-839f-c564d8433eb0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:03:12,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:03:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:12,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-03 02:03:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:12,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:12,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:03:12,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 02:03:13,156 INFO L356 Elim1Store]: treesize reduction 77, result has 23.8 percent of original size [2022-11-03 02:03:13,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 02:03:13,304 INFO L356 Elim1Store]: treesize reduction 147, result has 17.4 percent of original size [2022-11-03 02:03:13,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2022-11-03 02:03:13,457 INFO L356 Elim1Store]: treesize reduction 151, result has 13.7 percent of original size [2022-11-03 02:03:13,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 61 [2022-11-03 02:03:13,998 INFO L356 Elim1Store]: treesize reduction 375, result has 32.4 percent of original size [2022-11-03 02:03:13,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 75 treesize of output 204 [2022-11-03 02:03:16,232 INFO L356 Elim1Store]: treesize reduction 1039, result has 23.9 percent of original size [2022-11-03 02:03:16,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 334 treesize of output 546 [2022-11-03 02:03:36,938 WARN L234 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 744 DAG size of output: 196 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:03:36,939 INFO L356 Elim1Store]: treesize reduction 2464, result has 19.8 percent of original size [2022-11-03 02:03:36,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 170 case distinctions, treesize of input 532 treesize of output 957 [2022-11-03 02:07:57,628 WARN L234 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 967 DAG size of output: 967 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)