./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0236.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0236.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 --- 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-38b53e6 [2022-11-25 23:30:47,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:30:47,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:30:47,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:30:47,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:30:47,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:30:47,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:30:47,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:30:47,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:30:47,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:30:47,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:30:47,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:30:47,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:30:47,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:30:47,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:30:47,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:30:47,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:30:47,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:30:47,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:30:47,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:30:47,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:30:47,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:30:47,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:30:47,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:30:47,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:30:47,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:30:47,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:30:47,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:30:47,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:30:47,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:30:47,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:30:47,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:30:47,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:30:47,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:30:47,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:30:47,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:30:47,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:30:47,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:30:47,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:30:47,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:30:47,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:30:47,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:30:47,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:30:47,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:30:47,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:30:47,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:30:47,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:30:47,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:30:47,591 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:30:47,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:30:47,591 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:30:47,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:30:47,592 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:30:47,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:30:47,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:30:47,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:30:47,594 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:30:47,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:30:47,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:30:47,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:30:47,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:30:47,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:30:47,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:30:47,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:30:47,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:30:47,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:30:47,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:30:47,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:30:47,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:30:47,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:30:47,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:30:47,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:30:47,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:30:47,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:30:47,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:30:47,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:30:47,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:30:47,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:47,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:30:47,600 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:30:47,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:30:47,600 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:30:47,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:30:47,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:30:47,601 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_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2022-11-25 23:30:47,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:30:47,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:30:47,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:30:47,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:30:47,882 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:30:47,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety/test-0236.i [2022-11-25 23:30:51,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:30:51,279 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:30:51,282 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/sv-benchmarks/c/memsafety/test-0236.i [2022-11-25 23:30:51,302 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/data/6f00bca6c/fea84cb675254763bbdf4603c9e6ff02/FLAG29c622600 [2022-11-25 23:30:51,316 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/data/6f00bca6c/fea84cb675254763bbdf4603c9e6ff02 [2022-11-25 23:30:51,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:30:51,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:30:51,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:51,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:30:51,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:30:51,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:51,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19564c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51, skipping insertion in model container [2022-11-25 23:30:51,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:51,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:30:51,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:30:51,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:51,842 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:30:51,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:51,969 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:30:51,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51 WrapperNode [2022-11-25 23:30:51,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:51,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:51,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:30:51,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:30:51,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,067 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 211 [2022-11-25 23:30:52,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:52,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:30:52,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:30:52,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:30:52,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,132 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:30:52,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:30:52,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:30:52,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:30:52,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (1/1) ... [2022-11-25 23:30:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:52,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:30:52,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-25 23:30:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-25 23:30:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:30:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:30:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:30:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:30:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:30:52,412 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:30:52,417 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:30:53,049 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:30:53,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:30:53,106 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 23:30:53,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:53 BoogieIcfgContainer [2022-11-25 23:30:53,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:30:53,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:30:53,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:30:53,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:30:53,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:30:51" (1/3) ... [2022-11-25 23:30:53,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b457e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:53, skipping insertion in model container [2022-11-25 23:30:53,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:51" (2/3) ... [2022-11-25 23:30:53,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b457e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:53, skipping insertion in model container [2022-11-25 23:30:53,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:53" (3/3) ... [2022-11-25 23:30:53,119 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2022-11-25 23:30:53,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:30:53,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2022-11-25 23:30:53,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:30:53,200 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55d5d69e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:30:53,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2022-11-25 23:30:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:30:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:30:53,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:53,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:30:53,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:30:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 378247, now seen corresponding path program 1 times [2022-11-25 23:30:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:53,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739070859] [2022-11-25 23:30:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:53,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:53,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:53,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739070859] [2022-11-25 23:30:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739070859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:53,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:53,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:53,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253972613] [2022-11-25 23:30:53,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:30:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:30:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:30:53,444 INFO L87 Difference]: Start difference. First operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-25 23:30:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:53,531 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2022-11-25 23:30:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:30:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-25 23:30:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:53,546 INFO L225 Difference]: With dead ends: 180 [2022-11-25 23:30:53,548 INFO L226 Difference]: Without dead ends: 179 [2022-11-25 23:30:53,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:30:53,556 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:53,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-25 23:30:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-25 23:30:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:30:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2022-11-25 23:30:53,630 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 3 [2022-11-25 23:30:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:53,630 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2022-11-25 23:30:53,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-25 23:30:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2022-11-25 23:30:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:30:53,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:53,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:30:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:30:53,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:30:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash 358839889, now seen corresponding path program 1 times [2022-11-25 23:30:53,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:53,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740521640] [2022-11-25 23:30:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:53,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:30:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8918813] [2022-11-25 23:30:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:53,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:53,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:53,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:53,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:30:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:30:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:53,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:30:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:53,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:53,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:53,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740521640] [2022-11-25 23:30:53,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:30:53,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8918813] [2022-11-25 23:30:53,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8918813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:53,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:53,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:30:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715382532] [2022-11-25 23:30:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:53,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:53,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:53,898 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:54,174 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2022-11-25 23:30:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:30:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:54,183 INFO L225 Difference]: With dead ends: 178 [2022-11-25 23:30:54,183 INFO L226 Difference]: Without dead ends: 178 [2022-11-25 23:30:54,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:54,184 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:54,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 264 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-25 23:30:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-11-25 23:30:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 83 states have (on average 2.180722891566265) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:30:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2022-11-25 23:30:54,202 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 5 [2022-11-25 23:30:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:54,203 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2022-11-25 23:30:54,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2022-11-25 23:30:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:30:54,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:54,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:30:54,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:30:54,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:54,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:30:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1760864977, now seen corresponding path program 1 times [2022-11-25 23:30:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:54,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038074135] [2022-11-25 23:30:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:54,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:30:54,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021863153] [2022-11-25 23:30:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:54,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:54,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:30:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:30:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:54,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:30:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:54,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:54,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038074135] [2022-11-25 23:30:54,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:30:54,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021863153] [2022-11-25 23:30:54,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021863153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:54,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:54,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040352412] [2022-11-25 23:30:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:30:54,613 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:54,844 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2022-11-25 23:30:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:30:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:30:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:54,846 INFO L225 Difference]: With dead ends: 183 [2022-11-25 23:30:54,846 INFO L226 Difference]: Without dead ends: 183 [2022-11-25 23:30:54,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:54,847 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 8 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:54,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 430 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-25 23:30:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-25 23:30:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 87 states have (on average 2.1379310344827585) internal successors, (186), 174 states have internal predecessors, (186), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:30:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2022-11-25 23:30:54,857 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 6 [2022-11-25 23:30:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:54,858 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2022-11-25 23:30:54,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2022-11-25 23:30:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 23:30:54,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:54,859 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:54,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:55,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:30:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2018843385, now seen corresponding path program 1 times [2022-11-25 23:30:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:55,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917670986] [2022-11-25 23:30:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:55,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:30:55,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089905325] [2022-11-25 23:30:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:55,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:55,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:30:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:30:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:55,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:30:55,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:30:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:30:55,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:55,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917670986] [2022-11-25 23:30:55,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:30:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089905325] [2022-11-25 23:30:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089905325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:55,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:55,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:30:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019317360] [2022-11-25 23:30:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:55,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:55,758 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:30:57,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:31:03,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:31:06,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:31:08,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:31:10,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:31:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:11,405 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2022-11-25 23:31:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:31:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-11-25 23:31:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:11,408 INFO L225 Difference]: With dead ends: 187 [2022-11-25 23:31:11,408 INFO L226 Difference]: Without dead ends: 185 [2022-11-25 23:31:11,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2022-11-25 23:31:11,409 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:11,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 569 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 5 Unknown, 0 Unchecked, 11.5s Time] [2022-11-25 23:31:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-25 23:31:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-25 23:31:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 176 states have internal predecessors, (188), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 23:31:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2022-11-25 23:31:11,417 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 45 [2022-11-25 23:31:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:11,417 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2022-11-25 23:31:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:31:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2022-11-25 23:31:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:31:11,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:11,420 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:11,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:11,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:31:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2023413647, now seen corresponding path program 1 times [2022-11-25 23:31:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:11,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023330663] [2022-11-25 23:31:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:11,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:11,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967251822] [2022-11-25 23:31:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:11,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:11,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:31:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:31:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:12,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:31:12,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 23:31:12,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:31:12,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:12,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023330663] [2022-11-25 23:31:12,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:12,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967251822] [2022-11-25 23:31:12,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967251822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:12,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098643294] [2022-11-25 23:31:12,499 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:31:12,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:12,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:12,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:12,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:12,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:12,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:12,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:12,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:12,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:12,833 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:31:12,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2022-11-25 23:31:12,876 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:31:12,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2022-11-25 23:31:12,919 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:31:12,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2022-11-25 23:31:13,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:13,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:13,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:13,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:13,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:13,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:14,167 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:31:14,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:14,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:14,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:14,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:14,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:14,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:14,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:14,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:14,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:20,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2098643294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:20,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:20,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6] total 31 [2022-11-25 23:31:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784735189] [2022-11-25 23:31:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:20,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:31:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:31:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:31:20,465 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:31:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:23,768 INFO L93 Difference]: Finished difference Result 373 states and 403 transitions. [2022-11-25 23:31:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:31:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-11-25 23:31:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:23,771 INFO L225 Difference]: With dead ends: 373 [2022-11-25 23:31:23,771 INFO L226 Difference]: Without dead ends: 373 [2022-11-25 23:31:23,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:31:23,772 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 331 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:23,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1055 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 23:31:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-25 23:31:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 236. [2022-11-25 23:31:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 132 states have (on average 2.0833333333333335) internal successors, (275), 219 states have internal predecessors, (275), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:31:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-25 23:31:23,783 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 50 [2022-11-25 23:31:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:23,783 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-25 23:31:23,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:31:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-25 23:31:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:31:23,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:23,785 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:23,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:23,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:23,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:31:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598511, now seen corresponding path program 1 times [2022-11-25 23:31:23,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:23,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096048235] [2022-11-25 23:31:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:23,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:24,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:24,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085528916] [2022-11-25 23:31:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:24,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:24,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:24,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:31:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:31:24,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:24,324 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_219 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_219))) is different from true [2022-11-25 23:31:24,389 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:31:24,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:31:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 1 not checked. [2022-11-25 23:31:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:24,615 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:31:24,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-25 23:31:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 23:31:24,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096048235] [2022-11-25 23:31:24,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085528916] [2022-11-25 23:31:24,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085528916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761945127] [2022-11-25 23:31:24,648 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:31:24,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:24,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:24,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:24,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:24,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:24,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:24,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:24,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:24,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:24,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:31:24,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:31:24,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:31:25,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:25,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:25,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:25,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:25,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:25,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:26,796 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:31:26,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:26,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:26,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:27,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:27,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:27,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:27,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:27,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:27,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:34,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3083#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:34,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:34,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-11-25 23:31:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129485347] [2022-11-25 23:31:34,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:31:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:31:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=907, Unknown=1, NotChecked=62, Total=1122 [2022-11-25 23:31:34,074 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:34,737 INFO L93 Difference]: Finished difference Result 265 states and 327 transitions. [2022-11-25 23:31:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:31:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-11-25 23:31:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:34,740 INFO L225 Difference]: With dead ends: 265 [2022-11-25 23:31:34,740 INFO L226 Difference]: Without dead ends: 265 [2022-11-25 23:31:34,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=182, Invalid=1153, Unknown=1, NotChecked=70, Total=1406 [2022-11-25 23:31:34,741 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 115 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:34,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 719 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 617 Invalid, 0 Unknown, 213 Unchecked, 0.5s Time] [2022-11-25 23:31:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-25 23:31:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 232. [2022-11-25 23:31:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 2.022727272727273) internal successors, (267), 215 states have internal predecessors, (267), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:31:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2022-11-25 23:31:34,760 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 54 [2022-11-25 23:31:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:34,763 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2022-11-25 23:31:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2022-11-25 23:31:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:31:34,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:34,768 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:34,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:34,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:31:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598510, now seen corresponding path program 1 times [2022-11-25 23:31:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650180007] [2022-11-25 23:31:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:35,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:35,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742035618] [2022-11-25 23:31:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:35,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:35,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:35,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:31:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:31:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:35,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:31:37,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:31:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-25 23:31:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 23:31:40,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:40,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650180007] [2022-11-25 23:31:40,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:40,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742035618] [2022-11-25 23:31:40,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742035618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:40,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812841171] [2022-11-25 23:31:40,250 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:31:40,251 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:40,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:40,251 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:40,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:40,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:40,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:40,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:40,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:40,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:31:40,557 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:31:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2022-11-25 23:31:40,592 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:31:40,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2022-11-25 23:31:40,627 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:31:40,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 179 [2022-11-25 23:31:40,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:40,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:40,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:40,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:40,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:40,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:40,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:41,819 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:31:41,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:41,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:41,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:42,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:42,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:42,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:42,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:42,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:42,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:51,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3940#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:51,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:51,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:51,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 23:31:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889121163] [2022-11-25 23:31:51,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:31:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:31:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:31:51,114 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:31:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:53,029 INFO L93 Difference]: Finished difference Result 252 states and 315 transitions. [2022-11-25 23:31:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:31:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 54 [2022-11-25 23:31:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:53,031 INFO L225 Difference]: With dead ends: 252 [2022-11-25 23:31:53,032 INFO L226 Difference]: Without dead ends: 244 [2022-11-25 23:31:53,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:31:53,033 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 18 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 849 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:31:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-25 23:31:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-25 23:31:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 144 states have (on average 1.9375) internal successors, (279), 227 states have internal predecessors, (279), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:31:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 303 transitions. [2022-11-25 23:31:53,041 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 303 transitions. Word has length 54 [2022-11-25 23:31:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:53,041 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 303 transitions. [2022-11-25 23:31:53,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:31:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 303 transitions. [2022-11-25 23:31:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:31:53,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:53,043 INFO L195 NwaCegarLoop]: trace histogram [24, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:53,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 23:31:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:53,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:31:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 280114206, now seen corresponding path program 2 times [2022-11-25 23:31:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169856437] [2022-11-25 23:31:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:53,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099085439] [2022-11-25 23:31:53,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:31:53,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:53,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:53,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:53,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:31:53,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:31:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:31:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:53,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:31:53,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:31:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-25 23:31:54,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-25 23:31:54,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169856437] [2022-11-25 23:31:54,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099085439] [2022-11-25 23:31:54,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099085439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373289518] [2022-11-25 23:31:54,557 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:31:54,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:54,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:54,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:54,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:54,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:54,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:54,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:54,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:54,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:54,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:31:54,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:31:54,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:31:54,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:54,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:54,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:54,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:54,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:54,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:54,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:31:56,278 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:31:56,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:31:56,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:31:56,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:56,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:56,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:56,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:31:56,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:31:56,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:03,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4912#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:03,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:03,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:32:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-25 23:32:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606826044] [2022-11-25 23:32:03,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:32:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:32:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:32:03,543 INFO L87 Difference]: Start difference. First operand 244 states and 303 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:32:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:05,374 INFO L93 Difference]: Finished difference Result 264 states and 331 transitions. [2022-11-25 23:32:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:32:05,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-11-25 23:32:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:05,376 INFO L225 Difference]: With dead ends: 264 [2022-11-25 23:32:05,376 INFO L226 Difference]: Without dead ends: 258 [2022-11-25 23:32:05,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=446, Invalid=2524, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:32:05,377 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 40 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:05,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1394 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:32:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-25 23:32:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-11-25 23:32:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 241 states have internal predecessors, (293), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:32:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 317 transitions. [2022-11-25 23:32:05,393 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 317 transitions. Word has length 72 [2022-11-25 23:32:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:05,394 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 317 transitions. [2022-11-25 23:32:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:32:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 317 transitions. [2022-11-25 23:32:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 23:32:05,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:05,399 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:05,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:32:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:32:05,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:32:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1473855924, now seen corresponding path program 3 times [2022-11-25 23:32:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:05,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143797834] [2022-11-25 23:32:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:05,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:05,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549044058] [2022-11-25 23:32:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:32:05,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:05,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:05,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:32:06,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:32:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:32:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 23:32:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:07,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:32:07,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 345 proven. 55 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-25 23:32:07,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 345 proven. 55 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-25 23:32:08,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:08,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143797834] [2022-11-25 23:32:08,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549044058] [2022-11-25 23:32:08,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549044058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404689480] [2022-11-25 23:32:08,530 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:32:08,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:08,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:08,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:08,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:08,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:32:08,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:32:08,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:32:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:32:08,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:32:08,769 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:32:08,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 187 [2022-11-25 23:32:08,834 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:32:08,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2022-11-25 23:32:08,865 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:32:08,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2022-11-25 23:32:08,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:09,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:32:09,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:32:09,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:32:09,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:32:09,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:32:10,012 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:32:10,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:32:10,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:32:10,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:10,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:32:10,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:10,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:10,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:32:10,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:32:10,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:18,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6010#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:18,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:18,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:32:18,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-25 23:32:18,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685256940] [2022-11-25 23:32:18,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:18,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:32:18,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:32:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:32:18,629 INFO L87 Difference]: Start difference. First operand 258 states and 317 transitions. Second operand has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:32:36,676 WARN L233 SmtUtils]: Spent 15.42s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:46,530 WARN L233 SmtUtils]: Spent 9.05s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:00,643 INFO L93 Difference]: Finished difference Result 310 states and 389 transitions. [2022-11-25 23:33:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 23:33:00,648 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 83 [2022-11-25 23:33:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:00,650 INFO L225 Difference]: With dead ends: 310 [2022-11-25 23:33:00,650 INFO L226 Difference]: Without dead ends: 294 [2022-11-25 23:33:00,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=1350, Invalid=6660, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 23:33:00,654 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 99 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:00,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 2032 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:33:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-25 23:33:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-11-25 23:33:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 194 states have (on average 1.6958762886597938) internal successors, (329), 277 states have internal predecessors, (329), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:33:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 353 transitions. [2022-11-25 23:33:00,663 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 353 transitions. Word has length 83 [2022-11-25 23:33:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:00,663 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 353 transitions. [2022-11-25 23:33:00,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:33:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 353 transitions. [2022-11-25 23:33:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 23:33:00,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:00,666 INFO L195 NwaCegarLoop]: trace histogram [77, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:00,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:00,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:33:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -194987276, now seen corresponding path program 4 times [2022-11-25 23:33:00,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869985612] [2022-11-25 23:33:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:00,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:00,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:00,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152164029] [2022-11-25 23:33:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:33:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:00,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:00,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:33:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 23:33:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:07,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 23:33:08,148 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2033 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2033) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:33:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:33:08,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:33:08,298 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:33:08,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:33:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 1709 proven. 0 refuted. 0 times theorem prover too weak. 1475 trivial. 279 not checked. [2022-11-25 23:33:08,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:12,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:12,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869985612] [2022-11-25 23:33:12,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:33:12,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152164029] [2022-11-25 23:33:12,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152164029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:12,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976843883] [2022-11-25 23:33:12,473 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:33:12,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:12,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:33:12,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:33:12,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:33:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:33:12,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:33:12,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:33:12,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:12,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:12,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:33:12,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:33:12,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:33:12,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:33:12,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:12,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:12,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:33:12,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:33:12,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:33:12,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:33:14,219 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:33:14,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:33:14,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:33:14,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:14,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:33:14,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:33:14,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:14,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:33:14,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:33:14,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:33:21,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7107#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:33:21,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:33:21,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:21,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-25 23:33:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377678127] [2022-11-25 23:33:21,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:33:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:33:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=970, Unknown=1, NotChecked=64, Total=1190 [2022-11-25 23:33:21,297 INFO L87 Difference]: Start difference. First operand 294 states and 353 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:33:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:22,394 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2022-11-25 23:33:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:33:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 125 [2022-11-25 23:33:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:22,411 INFO L225 Difference]: With dead ends: 341 [2022-11-25 23:33:22,411 INFO L226 Difference]: Without dead ends: 341 [2022-11-25 23:33:22,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=173, Invalid=1162, Unknown=1, NotChecked=70, Total=1406 [2022-11-25 23:33:22,412 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 290 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:22,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 573 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 964 Invalid, 0 Unknown, 187 Unchecked, 0.9s Time] [2022-11-25 23:33:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-25 23:33:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 290. [2022-11-25 23:33:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 194 states have (on average 1.6546391752577319) internal successors, (321), 273 states have internal predecessors, (321), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:33:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 345 transitions. [2022-11-25 23:33:22,425 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 345 transitions. Word has length 125 [2022-11-25 23:33:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:22,426 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 345 transitions. [2022-11-25 23:33:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:33:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 345 transitions. [2022-11-25 23:33:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 23:33:22,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:22,429 INFO L195 NwaCegarLoop]: trace histogram [77, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:22,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:33:22,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:33:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1596114826, now seen corresponding path program 1 times [2022-11-25 23:33:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:22,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252021579] [2022-11-25 23:33:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:22,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:22,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314362699] [2022-11-25 23:33:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:22,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:22,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:33:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:23,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:33:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:33:23,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-25 23:33:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 1395 proven. 0 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2022-11-25 23:33:23,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:23,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252021579] [2022-11-25 23:33:23,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:33:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314362699] [2022-11-25 23:33:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314362699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:23,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:23,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:33:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312878162] [2022-11-25 23:33:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:33:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:33:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:33:23,454 INFO L87 Difference]: Start difference. First operand 290 states and 345 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:33:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:23,905 INFO L93 Difference]: Finished difference Result 291 states and 345 transitions. [2022-11-25 23:33:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:33:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 127 [2022-11-25 23:33:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:23,908 INFO L225 Difference]: With dead ends: 291 [2022-11-25 23:33:23,908 INFO L226 Difference]: Without dead ends: 291 [2022-11-25 23:33:23,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:33:23,910 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 19 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:23,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 760 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:33:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-25 23:33:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2022-11-25 23:33:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 194 states have (on average 1.6443298969072164) internal successors, (319), 272 states have internal predecessors, (319), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:33:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 343 transitions. [2022-11-25 23:33:23,920 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 343 transitions. Word has length 127 [2022-11-25 23:33:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:23,921 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 343 transitions. [2022-11-25 23:33:23,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 23:33:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 343 transitions. [2022-11-25 23:33:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 23:33:23,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:23,923 INFO L195 NwaCegarLoop]: trace histogram [77, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:23,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:24,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:24,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:33:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1596114827, now seen corresponding path program 1 times [2022-11-25 23:33:24,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642587834] [2022-11-25 23:33:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:24,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:24,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085186422] [2022-11-25 23:33:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:24,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:24,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:24,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:33:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-25 23:33:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:24,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:33:52,805 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:33:52,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:33:53,006 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:33:53,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:34:00,925 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 32 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:00,941 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 23:34:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 1346 proven. 1368 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-11-25 23:34:00,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 1527 proven. 66 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2022-11-25 23:34:11,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642587834] [2022-11-25 23:34:11,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:34:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085186422] [2022-11-25 23:34:11,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085186422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326226408] [2022-11-25 23:34:11,155 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:34:11,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:11,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:11,156 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:11,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:11,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:34:11,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:34:11,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:34:11,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:11,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:11,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:34:11,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:34:11,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:34:11,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:11,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:34:11,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:34:11,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:34:11,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:34:11,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:34:12,691 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:34:12,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:34:12,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:34:12,853 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:34:12,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:34:12,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:34:13,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:34:13,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:34:13,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:34:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:13,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:34:13,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:34:13,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:58,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9560#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= |ULTIMATE.start_l4_insert_#t~mem8#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (not (<= (+ |ULTIMATE.start_l4_insert_#t~mem8#1.offset| 4) (select |#length| |ULTIMATE.start_l4_insert_#t~mem8#1.base|))) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) |ULTIMATE.start_l4_insert_#t~mem8#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:58,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:58,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:34:58,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 19] total 65 [2022-11-25 23:34:58,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024954582] [2022-11-25 23:34:58,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:58,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-25 23:34:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-25 23:34:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=7305, Unknown=10, NotChecked=0, Total=7832 [2022-11-25 23:34:58,360 INFO L87 Difference]: Start difference. First operand 289 states and 343 transitions. Second operand has 65 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:35:09,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:14,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:19,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:25,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:31,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:36,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:40,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:46,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:35:51,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:36:13,436 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:15,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:36:17,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:36:31,288 WARN L233 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:33,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:36:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:43,512 INFO L93 Difference]: Finished difference Result 298 states and 361 transitions. [2022-11-25 23:36:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:36:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 127 [2022-11-25 23:36:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:43,515 INFO L225 Difference]: With dead ends: 298 [2022-11-25 23:36:43,515 INFO L226 Difference]: Without dead ends: 294 [2022-11-25 23:36:43,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 161.1s TimeCoverageRelationStatistics Valid=862, Invalid=10244, Unknown=24, NotChecked=0, Total=11130 [2022-11-25 23:36:43,519 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 39 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 7 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 4472 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:43,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 4472 Invalid, 3390 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 3371 Invalid, 12 Unknown, 0 Unchecked, 29.5s Time] [2022-11-25 23:36:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-25 23:36:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-11-25 23:36:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 197 states have (on average 1.634517766497462) internal successors, (322), 276 states have internal predecessors, (322), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-25 23:36:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2022-11-25 23:36:43,532 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 127 [2022-11-25 23:36:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:43,532 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2022-11-25 23:36:43,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:36:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2022-11-25 23:36:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 23:36:43,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:43,535 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:43,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 23:36:43,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:36:43,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:36:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1912830973, now seen corresponding path program 1 times [2022-11-25 23:36:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024601307] [2022-11-25 23:36:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:43,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:43,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:36:43,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26798521] [2022-11-25 23:36:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:43,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:43,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:36:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:36:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:44,622 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4967 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4967))) is different from true [2022-11-25 23:36:44,749 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:36:44,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:36:44,782 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4968 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4968))) is different from true [2022-11-25 23:36:44,980 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:36:44,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:36:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 1763 proven. 436 refuted. 0 times theorem prover too weak. 1344 trivial. 3 not checked. [2022-11-25 23:36:45,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:45,590 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:36:45,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-25 23:36:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 1763 proven. 438 refuted. 0 times theorem prover too weak. 1345 trivial. 0 not checked. [2022-11-25 23:36:45,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024601307] [2022-11-25 23:36:45,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:36:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26798521] [2022-11-25 23:36:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26798521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749098149] [2022-11-25 23:36:45,610 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 23:36:45,610 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:45,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:45,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:45,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:45,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:36:45,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:36:45,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:36:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:36:45,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:36:45,757 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:36:45,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2022-11-25 23:36:45,791 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:36:45,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2022-11-25 23:36:45,821 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:36:45,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2022-11-25 23:36:45,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:45,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:45,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:45,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:36:45,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:36:45,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:36:46,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:36:46,821 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:36:46,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:36:46,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:36:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:46,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:36:46,938 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:36:46,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:36:46,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-25 23:36:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:47,061 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:36:47,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2022-11-25 23:36:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:47,102 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-11-25 23:36:47,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 75 [2022-11-25 23:36:47,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:36:47,247 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:36:47,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:36:47,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:36:47,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:47,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:47,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:47,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:47,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:36:47,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:47,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:57,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10999#(and (not (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.base|) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:57,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:57,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:36:57,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2022-11-25 23:36:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523397129] [2022-11-25 23:36:57,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:36:57,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:36:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1208, Unknown=2, NotChecked=146, Total=1560 [2022-11-25 23:36:57,103 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:36:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:57,970 INFO L93 Difference]: Finished difference Result 322 states and 386 transitions. [2022-11-25 23:36:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:36:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 130 [2022-11-25 23:36:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:57,973 INFO L225 Difference]: With dead ends: 322 [2022-11-25 23:36:57,973 INFO L226 Difference]: Without dead ends: 322 [2022-11-25 23:36:57,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 339 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=242, Invalid=1656, Unknown=2, NotChecked=170, Total=2070 [2022-11-25 23:36:57,975 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 197 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:57,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 812 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 752 Invalid, 0 Unknown, 388 Unchecked, 0.7s Time] [2022-11-25 23:36:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-25 23:36:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 290. [2022-11-25 23:36:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 197 states have (on average 1.5939086294416243) internal successors, (314), 272 states have internal predecessors, (314), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-25 23:36:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 348 transitions. [2022-11-25 23:36:57,988 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 348 transitions. Word has length 130 [2022-11-25 23:36:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:57,988 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 348 transitions. [2022-11-25 23:36:57,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:36:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 348 transitions. [2022-11-25 23:36:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 23:36:57,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:57,991 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:58,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:36:58,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:36:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1912830974, now seen corresponding path program 1 times [2022-11-25 23:36:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124046188] [2022-11-25 23:36:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:58,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:36:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390643054] [2022-11-25 23:36:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:58,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:58,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:58,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:36:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1753 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 23:36:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:59,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:37:08,770 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5973 Int) (v_ArrVal_5972 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5972)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5973) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:37:09,421 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:37:09,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:37:09,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:37:09,694 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5974 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5974) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:37:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:09,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:37:09,877 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:37:09,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:37:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 1625 proven. 218 refuted. 0 times theorem prover too weak. 870 trivial. 833 not checked. [2022-11-25 23:37:10,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:12,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124046188] [2022-11-25 23:37:12,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:37:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390643054] [2022-11-25 23:37:12,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390643054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760384088] [2022-11-25 23:37:12,983 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 23:37:12,983 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:12,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:12,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:12,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:13,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:37:13,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:37:13,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:37:13,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:13,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:37:13,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:37:13,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:37:13,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:13,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:37:13,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:13,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:37:13,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:37:13,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:37:13,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:37:14,468 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:37:14,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:37:14,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:37:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:14,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:37:14,614 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:37:14,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:37:14,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-25 23:37:14,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:37:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:14,718 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-11-25 23:37:14,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 65 [2022-11-25 23:37:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:14,753 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:37:14,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2022-11-25 23:37:14,876 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:37:14,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:37:14,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:37:15,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:15,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:15,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:37:15,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:37:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:15,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:37:15,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:53,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12082#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.base|) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 4) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:53,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:53,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:37:53,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-25 23:37:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980440443] [2022-11-25 23:37:53,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:53,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:37:53,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:37:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2120, Unknown=6, NotChecked=190, Total=2550 [2022-11-25 23:37:53,887 INFO L87 Difference]: Start difference. First operand 290 states and 348 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:37:55,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:37:57,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:38:02,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:38:04,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:38:06,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:38:25,756 WARN L233 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:42,162 INFO L93 Difference]: Finished difference Result 319 states and 381 transitions. [2022-11-25 23:38:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:38:42,162 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2022-11-25 23:38:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:42,164 INFO L225 Difference]: With dead ends: 319 [2022-11-25 23:38:42,165 INFO L226 Difference]: Without dead ends: 319 [2022-11-25 23:38:42,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 82.1s TimeCoverageRelationStatistics Valid=317, Invalid=3220, Unknown=11, NotChecked=234, Total=3782 [2022-11-25 23:38:42,167 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 375 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 20 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:42,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1029 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1541 Invalid, 5 Unknown, 379 Unchecked, 16.4s Time] [2022-11-25 23:38:42,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-25 23:38:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 288. [2022-11-25 23:38:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 197 states have (on average 1.5736040609137056) internal successors, (310), 270 states have internal predecessors, (310), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-25 23:38:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 344 transitions. [2022-11-25 23:38:42,180 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 344 transitions. Word has length 130 [2022-11-25 23:38:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:42,181 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 344 transitions. [2022-11-25 23:38:42,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:38:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 344 transitions. [2022-11-25 23:38:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:38:42,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:42,183 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:42,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:42,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:38:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1940321009, now seen corresponding path program 1 times [2022-11-25 23:38:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:42,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956481963] [2022-11-25 23:38:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:42,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:38:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316011988] [2022-11-25 23:38:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:42,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:38:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-25 23:38:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:57,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:38:57,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:38:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 2080 proven. 517 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2022-11-25 23:38:57,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 441 proven. 504 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2022-11-25 23:38:59,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:59,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956481963] [2022-11-25 23:38:59,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:38:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316011988] [2022-11-25 23:38:59,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316011988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631376243] [2022-11-25 23:38:59,154 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 23:38:59,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:59,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:59,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:59,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:59,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:38:59,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:38:59,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:38:59,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:38:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:38:59,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:38:59,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:38:59,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:38:59,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:38:59,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:38:59,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:38:59,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:38:59,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:38:59,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:38:59,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:00,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:00,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:00,603 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:39:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:39:00,707 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:39:00,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:39:00,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-25 23:39:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,813 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:39:00,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2022-11-25 23:39:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,853 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-11-25 23:39:00,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 75 [2022-11-25 23:39:00,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:00,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:00,993 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:39:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 94 [2022-11-25 23:39:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:01,082 INFO L321 Elim1Store]: treesize reduction 111, result has 10.5 percent of original size [2022-11-25 23:39:01,083 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 94 [2022-11-25 23:39:01,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:01,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:01,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:01,262 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-11-25 23:39:01,263 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 54 treesize of output 80 [2022-11-25 23:39:01,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:01,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:01,355 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:39:01,356 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 120 treesize of output 107 [2022-11-25 23:39:01,510 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:39:01,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:39:01,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:39:01,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:01,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:01,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:01,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:01,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:01,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:01,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:16,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13576#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:39:16,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:16,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:39:16,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 40 [2022-11-25 23:39:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331514718] [2022-11-25 23:39:16,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 23:39:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 23:39:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=4433, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 23:39:16,778 INFO L87 Difference]: Start difference. First operand 288 states and 344 transitions. Second operand has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 40 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:39:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:18,598 INFO L93 Difference]: Finished difference Result 286 states and 333 transitions. [2022-11-25 23:39:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:39:18,599 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 40 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 134 [2022-11-25 23:39:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:18,600 INFO L225 Difference]: With dead ends: 286 [2022-11-25 23:39:18,601 INFO L226 Difference]: Without dead ends: 284 [2022-11-25 23:39:18,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 325 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=565, Invalid=6241, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 23:39:18,603 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 22 mSDsluCounter, 3574 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:18,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3717 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:39:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-25 23:39:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-11-25 23:39:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 196 states have (on average 1.566326530612245) internal successors, (307), 267 states have internal predecessors, (307), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:39:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-11-25 23:39:18,612 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 134 [2022-11-25 23:39:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:18,612 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-11-25 23:39:18,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 40 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:39:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-11-25 23:39:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-25 23:39:18,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:18,614 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:18,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:18,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:39:18,815 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:39:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1145578977, now seen corresponding path program 2 times [2022-11-25 23:39:18,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:18,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932066964] [2022-11-25 23:39:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:18,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:39:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567027449] [2022-11-25 23:39:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:39:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:18,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:18,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:39:20,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:39:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:39:20,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-25 23:39:20,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:20,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:39:20,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:39:21,561 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:39:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 23:39:21,585 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:39:21,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 23:39:21,918 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 23:39:21,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:39:21,932 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:39:21,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:39:21,991 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:39:22,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-25 23:39:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1946 proven. 776 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2022-11-25 23:39:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:26,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932066964] [2022-11-25 23:39:26,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:39:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567027449] [2022-11-25 23:39:26,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567027449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35316133] [2022-11-25 23:39:26,476 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 23:39:26,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:26,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:26,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:26,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:26,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:39:26,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:39:26,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:26,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:26,658 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:26,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2022-11-25 23:39:26,716 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:39:26,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 183 [2022-11-25 23:39:26,775 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:26,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2022-11-25 23:39:26,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:26,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:26,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:26,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:26,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:26,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:26,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:27,854 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:39:27,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:27,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:27,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:39:27,986 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:39:27,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:39:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-25 23:39:28,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,089 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:28,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 55 [2022-11-25 23:39:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,127 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-25 23:39:28,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-25 23:39:28,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:28,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:28,260 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:39:28,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-11-25 23:39:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:28,296 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-25 23:39:28,296 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 47 treesize of output 55 [2022-11-25 23:39:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:28,446 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:39:28,447 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 93 [2022-11-25 23:39:28,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:28,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:28,528 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-11-25 23:39:28,529 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 54 treesize of output 80 [2022-11-25 23:39:28,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:28,707 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:39:28,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:39:28,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:39:28,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:28,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:28,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:28,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:29,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:29,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:29,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:42,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14667#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:39:42,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:42,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:39:42,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-25 23:39:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598900227] [2022-11-25 23:39:42,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:42,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:39:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:39:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2589, Unknown=2, NotChecked=0, Total=2862 [2022-11-25 23:39:42,955 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 21 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:39:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:45,768 INFO L93 Difference]: Finished difference Result 328 states and 379 transitions. [2022-11-25 23:39:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:39:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 138 [2022-11-25 23:39:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:45,770 INFO L225 Difference]: With dead ends: 328 [2022-11-25 23:39:45,770 INFO L226 Difference]: Without dead ends: 328 [2022-11-25 23:39:45,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=387, Invalid=3771, Unknown=2, NotChecked=0, Total=4160 [2022-11-25 23:39:45,772 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 533 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:45,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1083 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 23:39:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-25 23:39:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2022-11-25 23:39:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 265 states have internal predecessors, (303), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:39:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2022-11-25 23:39:45,782 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 138 [2022-11-25 23:39:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:45,783 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2022-11-25 23:39:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:39:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2022-11-25 23:39:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-25 23:39:45,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:45,784 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:45,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:45,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:39:45,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:39:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1153209907, now seen corresponding path program 1 times [2022-11-25 23:39:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:45,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103421151] [2022-11-25 23:39:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:46,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:39:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742084421] [2022-11-25 23:39:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:46,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:46,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:39:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:46,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 23:39:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:47,244 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:39:47,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:39:47,301 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9163 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9163)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:39:47,404 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:39:47,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 23:39:47,445 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9164 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9164))) is different from true [2022-11-25 23:39:47,663 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-25 23:39:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:39:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1645 proven. 774 refuted. 0 times theorem prover too weak. 821 trivial. 648 not checked. [2022-11-25 23:39:47,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:48,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103421151] [2022-11-25 23:39:48,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:39:48,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742084421] [2022-11-25 23:39:48,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742084421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:48,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1858545658] [2022-11-25 23:39:48,098 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:39:48,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:48,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:48,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:48,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:48,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:39:48,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:39:48,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:48,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:48,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:48,294 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:48,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 185 [2022-11-25 23:39:48,327 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:48,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2022-11-25 23:39:48,355 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:39:48,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 179 [2022-11-25 23:39:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:48,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:48,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:48,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:48,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:48,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:48,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:39:49,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:49,373 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:39:49,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:39:49,487 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:39:49,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:39:49,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-25 23:39:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,570 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:39:49,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 55 [2022-11-25 23:39:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,607 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-25 23:39:49,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-25 23:39:49,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:49,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:49,784 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:39:49,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-11-25 23:39:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:49,823 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-25 23:39:49,824 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 47 treesize of output 55 [2022-11-25 23:39:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:49,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:49,976 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:39:49,977 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 93 [2022-11-25 23:39:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:39:50,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:39:50,058 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-11-25 23:39:50,058 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 54 treesize of output 80 [2022-11-25 23:39:50,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:39:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:39:50,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:50,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:50,275 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:39:50,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:39:50,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:39:50,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:50,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:39:50,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:39:50,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:50,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:39:50,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:39:50,587 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:40:02,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15883#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (not (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:40:02,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:40:02,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:40:02,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-25 23:40:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168604455] [2022-11-25 23:40:02,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:40:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:40:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:40:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1915, Unknown=2, NotChecked=182, Total=2352 [2022-11-25 23:40:02,923 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:40:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:40:04,193 INFO L93 Difference]: Finished difference Result 308 states and 352 transitions. [2022-11-25 23:40:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:40:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 139 [2022-11-25 23:40:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:40:04,195 INFO L225 Difference]: With dead ends: 308 [2022-11-25 23:40:04,195 INFO L226 Difference]: Without dead ends: 308 [2022-11-25 23:40:04,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=297, Invalid=2465, Unknown=2, NotChecked=206, Total=2970 [2022-11-25 23:40:04,196 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 256 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 32 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:40:04,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 842 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 798 Invalid, 36 Unknown, 364 Unchecked, 1.0s Time] [2022-11-25 23:40:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-25 23:40:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 278. [2022-11-25 23:40:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 196 states have (on average 1.5051020408163265) internal successors, (295), 261 states have internal predecessors, (295), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:40:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 319 transitions. [2022-11-25 23:40:04,204 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 319 transitions. Word has length 139 [2022-11-25 23:40:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:40:04,205 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 319 transitions. [2022-11-25 23:40:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:40:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 319 transitions. [2022-11-25 23:40:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-25 23:40:04,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:40:04,207 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:40:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:40:04,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:40:04,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:40:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:40:04,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1153209906, now seen corresponding path program 1 times [2022-11-25 23:40:04,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:40:04,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134528529] [2022-11-25 23:40:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:04,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:40:04,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:40:04,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048954125] [2022-11-25 23:40:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:40:04,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:40:04,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:40:04,498 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:40:04,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:40:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:40:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-25 23:40:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:40:11,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:40:25,952 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:40:25,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:40:25,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:40:28,175 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:40:28,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:40:28,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:40:29,443 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10256 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_10256) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:40:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:29,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-11-25 23:40:29,624 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 23:40:29,624 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-25 23:40:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 974 proven. 1232 refuted. 0 times theorem prover too weak. 523 trivial. 1159 not checked. [2022-11-25 23:40:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:40:32,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:40:32,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134528529] [2022-11-25 23:40:32,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:40:32,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048954125] [2022-11-25 23:40:32,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048954125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:40:32,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836942505] [2022-11-25 23:40:32,349 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:40:32,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:40:32,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:40:32,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:40:32,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:40:32,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:40:32,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:40:32,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:40:32,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:32,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:40:32,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:40:32,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:40:32,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:40:32,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:32,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:32,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:40:32,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:40:32,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:40:32,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:40:33,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:40:33,915 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:40:33,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:33,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:40:34,024 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:40:34,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:40:34,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-25 23:40:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,137 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:40:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 55 [2022-11-25 23:40:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,200 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-25 23:40:34,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-25 23:40:34,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:40:34,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:40:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:34,327 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-25 23:40:34,327 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 47 treesize of output 55 [2022-11-25 23:40:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:34,373 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:40:34,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-11-25 23:40:34,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:40:34,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:34,541 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:40:34,541 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 93 [2022-11-25 23:40:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:40:34,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:40:34,631 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-11-25 23:40:34,631 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 54 treesize of output 80 [2022-11-25 23:40:34,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:40:34,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:34,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:34,838 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:40:34,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:40:34,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:40:34,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:40:35,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:40:35,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:40:35,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:35,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:40:35,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:40:35,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:41:24,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17006#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|) (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4)) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:41:24,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:41:24,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:24,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-11-25 23:41:24,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177219507] [2022-11-25 23:41:24,069 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:24,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 23:41:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 23:41:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=4929, Unknown=6, NotChecked=142, Total=5402 [2022-11-25 23:41:24,071 INFO L87 Difference]: Start difference. First operand 278 states and 319 transitions. Second operand has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:41:26,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:28,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:30,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:35,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:39,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:43,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:47,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:52,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:41:56,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:00,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:05,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:07,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:12,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:59,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:42:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:59,367 INFO L93 Difference]: Finished difference Result 303 states and 343 transitions. [2022-11-25 23:42:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:42:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 139 [2022-11-25 23:42:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:59,370 INFO L225 Difference]: With dead ends: 303 [2022-11-25 23:42:59,370 INFO L226 Difference]: Without dead ends: 303 [2022-11-25 23:42:59,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 124.8s TimeCoverageRelationStatistics Valid=507, Invalid=7851, Unknown=18, NotChecked=180, Total=8556 [2022-11-25 23:42:59,371 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 376 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 28 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:59,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1905 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2847 Invalid, 14 Unknown, 176 Unchecked, 36.5s Time] [2022-11-25 23:42:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-25 23:42:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-11-25 23:42:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 196 states have (on average 1.4642857142857142) internal successors, (287), 257 states have internal predecessors, (287), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:42:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2022-11-25 23:42:59,407 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 139 [2022-11-25 23:42:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:59,408 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2022-11-25 23:42:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:42:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2022-11-25 23:42:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-25 23:42:59,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:59,409 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:59,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:59,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:42:59,619 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:42:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1942389891, now seen corresponding path program 1 times [2022-11-25 23:42:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815870938] [2022-11-25 23:42:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:59,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:42:59,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65583342] [2022-11-25 23:42:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:59,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:59,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:59,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:59,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:43:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 23:43:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:00,793 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11376 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11376)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:43:00,880 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:00,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:43:00,895 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11377 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_11377))) is different from true [2022-11-25 23:43:00,929 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11377 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_11377))) is different from true [2022-11-25 23:43:00,944 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:00,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 23:43:00,985 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11378 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_11378))) is different from true [2022-11-25 23:43:01,013 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11378 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_11378))) is different from true [2022-11-25 23:43:01,026 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:01,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:43:01,077 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11379 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11379))) is different from true [2022-11-25 23:43:01,242 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:01,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-11-25 23:43:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 998 proven. 301 refuted. 0 times theorem prover too weak. 650 trivial. 1939 not checked. [2022-11-25 23:43:03,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:03,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815870938] [2022-11-25 23:43:03,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:43:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65583342] [2022-11-25 23:43:03,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65583342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:43:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602919303] [2022-11-25 23:43:03,252 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-25 23:43:03,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:43:03,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:43:03,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:43:03,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:43:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:43:03,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:43:03,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:43:03,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:03,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:43:03,388 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 23:43:03,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 187 [2022-11-25 23:43:03,419 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:43:03,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2022-11-25 23:43:03,447 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:43:03,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 177 [2022-11-25 23:43:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:03,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:03,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:43:03,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:43:03,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:43:03,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:43:03,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:43:04,413 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:43:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:04,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:43:04,527 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:43:04,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:43:04,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-25 23:43:04,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:43:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,639 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:43:04,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 55 [2022-11-25 23:43:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,676 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-25 23:43:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-25 23:43:04,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:04,785 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:43:04,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-11-25 23:43:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:04,838 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-25 23:43:04,838 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 47 treesize of output 55 [2022-11-25 23:43:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:04,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,005 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-11-25 23:43:05,005 INFO L350 Elim1Store]: Elim1 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 9 case distinctions, treesize of input 54 treesize of output 80 [2022-11-25 23:43:05,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,076 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:43:05,076 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 111 [2022-11-25 23:43:05,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:43:05,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:05,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:05,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:43:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,251 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:43:05,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-11-25 23:43:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,274 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:43:05,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-11-25 23:43:05,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:43:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,354 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-11-25 23:43:05,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2022-11-25 23:43:05,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:43:05,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,419 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-11-25 23:43:05,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 40 [2022-11-25 23:43:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,480 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:43:05,480 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 46 treesize of output 51 [2022-11-25 23:43:05,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:43:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:05,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:43:05,533 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:43:05,533 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 48 treesize of output 47 [2022-11-25 23:43:05,656 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:43:05,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:43:05,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:43:05,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:05,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:05,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:43:05,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:05,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:43:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:43:05,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:43:20,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18156#(and (or (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)))) (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_l2_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= |ULTIMATE.start_l2_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1)) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:43:20,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:43:20,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:43:20,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-25 23:43:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068055716] [2022-11-25 23:43:20,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:20,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:43:20,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:43:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2656, Unknown=36, NotChecked=666, Total=3660 [2022-11-25 23:43:20,226 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 23:43:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:21,338 INFO L93 Difference]: Finished difference Result 296 states and 330 transitions. [2022-11-25 23:43:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:43:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 144 [2022-11-25 23:43:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:21,340 INFO L225 Difference]: With dead ends: 296 [2022-11-25 23:43:21,340 INFO L226 Difference]: Without dead ends: 296 [2022-11-25 23:43:21,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 239 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=350, Invalid=3298, Unknown=36, NotChecked=738, Total=4422 [2022-11-25 23:43:21,341 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 161 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 27 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 1018 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:21,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 972 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 894 Invalid, 36 Unknown, 1018 Unchecked, 0.8s Time] [2022-11-25 23:43:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-25 23:43:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 270. [2022-11-25 23:43:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 196 states have (on average 1.4234693877551021) internal successors, (279), 253 states have internal predecessors, (279), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 23:43:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 303 transitions. [2022-11-25 23:43:21,349 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 303 transitions. Word has length 144 [2022-11-25 23:43:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:21,350 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 303 transitions. [2022-11-25 23:43:21,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 23:43:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 303 transitions. [2022-11-25 23:43:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-25 23:43:21,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:21,351 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:21,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:21,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:21,564 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-25 23:43:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1942389892, now seen corresponding path program 1 times [2022-11-25 23:43:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874623653] [2022-11-25 23:43:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:21,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:43:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862050511] [2022-11-25 23:43:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:21,645 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8157aa77-b119-4634-ba0a-0164997dacdf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:43:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-25 23:43:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:22,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:43:31,932 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12500 Int) (v_ArrVal_12501 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12501)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12500) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:43:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:32,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:43:32,124 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:32,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:43:32,398 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12502 Int) (v_ArrVal_12503 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12502)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12503) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 23:43:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:43:32,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:43:32,679 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:43:32,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:43:33,479 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:33,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:43:33,758 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:43:33,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 23:43:35,693 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12505 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (<= (mod .cse0 4294967296) v_ArrVal_12505) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12505) |c_#length|)))) is different from true [2022-11-25 23:43:38,663 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12505 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (< 12 .cse0) (<= .cse0 v_ArrVal_12505) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12505) |c_#length|)))) is different from true [2022-11-25 23:43:40,069 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:43:40,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 23:43:49,049 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 33 proven. 1216 refuted. 0 times theorem prover too weak. 311 trivial. 2328 not checked. [2022-11-25 23:43:59,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:13,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:44:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874623653] [2022-11-25 23:44:13,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:44:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862050511] [2022-11-25 23:44:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862050511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:44:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096658341] [2022-11-25 23:44:13,289 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-25 23:44:13,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:44:13,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:44:13,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:44:13,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:44:13,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:44:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:44:13,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:44:13,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:13,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:13,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 23:44:13,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:44:13,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 23:44:13,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:13,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:13,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:44:13,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:44:13,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:44:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:44:13,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 23:44:14,689 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 23:44:14,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:44:14,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:44:14,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:14,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 23:44:14,844 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 23:44:14,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 23:44:14,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-25 23:44:14,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:44:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:14,954 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:44:14,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2022-11-25 23:44:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,002 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-11-25 23:44:15,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 75 [2022-11-25 23:44:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:44:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,113 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:44:15,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 94 [2022-11-25 23:44:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,164 INFO L321 Elim1Store]: treesize reduction 111, result has 10.5 percent of original size [2022-11-25 23:44:15,164 INFO L350 Elim1Store]: Elim1 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 94 [2022-11-25 23:44:15,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:44:15,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,305 INFO L321 Elim1Store]: treesize reduction 120, result has 26.4 percent of original size [2022-11-25 23:44:15,306 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 119 [2022-11-25 23:44:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,377 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-11-25 23:44:15,378 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 120 treesize of output 107 [2022-11-25 23:44:15,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:44:15,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:44:15,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:44:15,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 23:44:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,555 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:44:15,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-11-25 23:44:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,580 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:44:15,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-11-25 23:44:15,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:44:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,654 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-11-25 23:44:15,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 40 [2022-11-25 23:44:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,729 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-11-25 23:44:15,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2022-11-25 23:44:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,795 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:44:15,796 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 46 treesize of output 51 [2022-11-25 23:44:15,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-25 23:44:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:44:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:44:15,850 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:44:15,850 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 42 treesize of output 47 [2022-11-25 23:44:15,971 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-11-25 23:44:16,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:44:16,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 23:44:16,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 23:44:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:44:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:44:16,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:16,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:44:16,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:44:16,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:45:19,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19307#(and (or (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)))) (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_l2_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= |ULTIMATE.start_l2_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (< (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|) (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4)) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-11-25 23:45:19,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:45:19,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:45:19,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2022-11-25 23:45:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202513110] [2022-11-25 23:45:19,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-25 23:45:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-25 23:45:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=7440, Unknown=26, NotChecked=708, Total=8556 [2022-11-25 23:45:19,525 INFO L87 Difference]: Start difference. First operand 270 states and 303 transitions. Second operand has 53 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:45:21,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:45:23,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]